You searched for subject:(Body drag).
Showing records 1 – 30 of
34 total matches.
◁ [1] [2] ▶
Delft University of Technology
1.
Hoogendoorn, Marijn (author).
Base Drag Reduction of Heavy Duty Vehicles by Combining a Tail and Guide Vanes: A Numerical and Experimental Analysis.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:bd10a9ef-54df-47fd-b8c2-5a9d5d9afa03 
► To limit the threat posed by global climate change it is vital to reduce the emissions of the transport sector in the short term. Two…
(more)
▼ To limit the threat posed by global climate change it is vital to reduce the emissions of the transport sector in the short term. Two existing aerodynamic add-on devices for the rear-end of a heavy duty vehicle, a tail and guide vanes, are combined in an attempt to achieve a larger
drag reduction. A research is performed using numerical simulations and a wind tunnel experiment in the Open Jet Facility to gain insight in the interaction between the tail and the guide vane. It was found that the guide vane is able to further increase the base pressure of the vehicle, but that the
drag reduction is sensitive to the
drag of the vane. Due to the interaction between the tail and the guide vane the largest
drag reduction is achieved when the guide vane is operating at its minimum
drag condition.
Advisors/Committee Members: van Raemdonck, Gandert (mentor), Timmer, Nando (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: bluff body; Aerodynamic drag; drag reduction; heavy duty vehicle
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hoogendoorn, M. (. (2018). Base Drag Reduction of Heavy Duty Vehicles by Combining a Tail and Guide Vanes: A Numerical and Experimental Analysis. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:bd10a9ef-54df-47fd-b8c2-5a9d5d9afa03
Chicago Manual of Style (16th Edition):
Hoogendoorn, Marijn (author). “Base Drag Reduction of Heavy Duty Vehicles by Combining a Tail and Guide Vanes: A Numerical and Experimental Analysis.” 2018. Masters Thesis, Delft University of Technology. Accessed January 21, 2021.
http://resolver.tudelft.nl/uuid:bd10a9ef-54df-47fd-b8c2-5a9d5d9afa03.
MLA Handbook (7th Edition):
Hoogendoorn, Marijn (author). “Base Drag Reduction of Heavy Duty Vehicles by Combining a Tail and Guide Vanes: A Numerical and Experimental Analysis.” 2018. Web. 21 Jan 2021.
Vancouver:
Hoogendoorn M(. Base Drag Reduction of Heavy Duty Vehicles by Combining a Tail and Guide Vanes: A Numerical and Experimental Analysis. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 21].
Available from: http://resolver.tudelft.nl/uuid:bd10a9ef-54df-47fd-b8c2-5a9d5d9afa03.
Council of Science Editors:
Hoogendoorn M(. Base Drag Reduction of Heavy Duty Vehicles by Combining a Tail and Guide Vanes: A Numerical and Experimental Analysis. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:bd10a9ef-54df-47fd-b8c2-5a9d5d9afa03
Loughborough University
2.
Varney, Max.
Base drag reduction for squareback road vehicles.
Degree: PhD, 2019, Loughborough University
URL: https://doi.org/10.26174/thesis.lboro.11823759.v1
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.799187
► As we are in the throes of a climate crisis, we need to scrutinise how our everyday activity impacts it. A significant portion of the…
(more)
▼ As we are in the throes of a climate crisis, we need to scrutinise how our everyday activity impacts it. A significant portion of the global CO 2 emissions are a result of passenger vehicles (16%) with a significant portion of these being sports utility vehicle geometries (37.5%). The squareback nature of sports utility vehicles is desired by some manufacturers to maintain brand identity, but these geometries are not typically aerodynamic. On top of this, the emissions regulations do not take into account realistic conditions that a vehicle will operate in, resulting in an underestimation of their impact on the global CO2 emissions. This thesis implements cavities and small trailing edge side edge tapers on a quarter scale Windsor model (with and without wheels) at more realistic flow conditions to generalise drag reduction techniques. These generalisations focus on the base of the model as this region generates a significant portion of the overall drag. As the geometries are unlikely to be implemented on a full-scale vehicle, the generalisations provide a goal for a lower drag vehicle which can be applied to any baseline geometry. Irrespective of the device used it was found that a way to reduce drag generally was to force the wake into a balanced, symmetric condition. The lateral symmetry is shown to reduce the instantaneous base drag at yaw on the baseline geometry, but also the mean base drag with a cavity or side edge tapering at yaw. The vertical symmetry is shown to improve the mean base drag on the Windsor model with wheels, both with a cavity and with the side edge tapering at all yaw angles tested. A symmetric, balanced wake was shown not to be the only route to low drag. The cavities showed a reduction in base drag due to the reduced flow velocity in the wake with flow field measurements inside the cavity, while presenting an asymmetric wake. The tapering generated base drag reductions with slower velocities parallel to the base, higher velocities perpendicular to the base and shorter wakes that were upwash or downwash dominated.
Subjects/Keywords: Base drag; bluff body; drag reduction; suv; cavities; tapers; fundamental flow
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Varney, M. (2019). Base drag reduction for squareback road vehicles. (Doctoral Dissertation). Loughborough University. Retrieved from https://doi.org/10.26174/thesis.lboro.11823759.v1 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.799187
Chicago Manual of Style (16th Edition):
Varney, Max. “Base drag reduction for squareback road vehicles.” 2019. Doctoral Dissertation, Loughborough University. Accessed January 21, 2021.
https://doi.org/10.26174/thesis.lboro.11823759.v1 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.799187.
MLA Handbook (7th Edition):
Varney, Max. “Base drag reduction for squareback road vehicles.” 2019. Web. 21 Jan 2021.
Vancouver:
Varney M. Base drag reduction for squareback road vehicles. [Internet] [Doctoral dissertation]. Loughborough University; 2019. [cited 2021 Jan 21].
Available from: https://doi.org/10.26174/thesis.lboro.11823759.v1 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.799187.
Council of Science Editors:
Varney M. Base drag reduction for squareback road vehicles. [Doctoral Dissertation]. Loughborough University; 2019. Available from: https://doi.org/10.26174/thesis.lboro.11823759.v1 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.799187
University of California – San Diego
3.
Blanck, Kimberly Yu.
Finding my Manhood.
Degree: Theatre and Dance, 2015, University of California – San Diego
URL: http://www.escholarship.org/uc/item/1vf6f92v
► Usually when I'm given a role, I've already imagined myself playing the part. I can see myself in the costume, floating across the stage, saying…
(more)
▼ Usually when I'm given a role, I've already imagined myself playing the part. I can see myself in the costume, floating across the stage, saying the lines. I think about what it all could look like and follow through with what my imagination serves up for me. But for Eddie Fuseli, I could not picture it. I couldn't picture my woman's body, my woman's voice and my woman's demeanor repackaged into a dead-faced, chain-smoking, catlike Italian gangster. The prospect of morphing into Eddie seemed impossible. I was terrified. I dreaded starting rehearsal - everyone would see how pathetic, how clueless, how ridiculous I was in attempting to play this part. Rehearsals did start and indeed, they were painful. Eddie's lines would come out of my mouth and instantly I'd feel ashamed. Everything felt wrong. I didn't sound like a man. I didn't look like a man. Completely lost, I pressed delete on everything I was working on and returned to the basics. To the breaking down of the body that we learned in Charlie's class. How does this man walk? To the archetypes. How high status is he? To the essential movements. How does he put his hand in his pocket? Slowly, I began to build Eddie using different parts of my body. As my corporal decisions became clearer, the manliness that I thought I'd never have began to emerge. And after that came the authority. The confidence. The nasal Italian drawl. Even some other surprising qualities began to surface: my Eddie was quick. Slick. Sharp. Though at the beginning I wasn't able to picture the final product, he managed to materialize through the structure I created with my own body, the same one I was convinced would fail me. It's empowering knowing that my body is always here for me in this art, and that it can change shape in ways I cannot even imagine.
Subjects/Keywords: Theater; body; drag; Eddie Fuseli; Golden Boy; movement
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Blanck, K. Y. (2015). Finding my Manhood. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/1vf6f92v
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Blanck, Kimberly Yu. “Finding my Manhood.” 2015. Thesis, University of California – San Diego. Accessed January 21, 2021.
http://www.escholarship.org/uc/item/1vf6f92v.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Blanck, Kimberly Yu. “Finding my Manhood.” 2015. Web. 21 Jan 2021.
Vancouver:
Blanck KY. Finding my Manhood. [Internet] [Thesis]. University of California – San Diego; 2015. [cited 2021 Jan 21].
Available from: http://www.escholarship.org/uc/item/1vf6f92v.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Blanck KY. Finding my Manhood. [Thesis]. University of California – San Diego; 2015. Available from: http://www.escholarship.org/uc/item/1vf6f92v
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Cal Poly
4.
Pinn, Jarred Michael.
Effect of End-Plate Tabs on Drag Reduction of a 3D Bluff Body with a Blunt Base.
Degree: MS, Aerospace Engineering, 2012, Cal Poly
URL: https://digitalcommons.calpoly.edu/theses/698
;
10.15368/theses.2012.16
► This thesis involves the experimental testing of a bluff body with a blunt base to evaluate the effectiveness of end-plate tabs in reducing drag.…
(more)
▼ This thesis involves the experimental testing of a bluff
body with a blunt base to evaluate the effectiveness of end-plate tabs in reducing
drag. The bluff
body is fitted with interchangeable end plates; one plate is flush with the rest of the exterior and the other plate has small tabs protruding perpendicularly into the flow. The
body is tested in the Cal Poly 3ft x 4ft low speed wind tunnel. Testing is conducted in three phases.
The first phase was the hot-wire measurement of streamwise velocity of the near wake behind the bluff
body. An IFA300 thermal anemometry system with a hot-wire probe placed behind the model measures the wake velocity fluctuations. The power spectral density on the model without tabs shows large spikes at Strouhal numbers of 0.266, 0.300, and 0.287 at corresponding Re = 41,400, 82,800, 124,200 where vortex shedding occurs. The model with tabs shows no such peaks in power and therefore has attenuated vortex generation in the wake flow at that location.
The second phase of testing was pressure testing the model through the use of pressure ports on the exterior of the bluff
body. A Scanivalve pressure transducer measured multiple ports almost simultaneously through tubing that was connected to the model internally and routed through the model’s strut mount and outside of the wind tunnel. This pressure testing shows that the model with tabs is able to achieve up to 36% increase in C
p at Re
h = 41,400 on the base region of the bluff
body and no negative pressure spikes that occur as a result of vortex shedding.
The last phase of testing is the measurement of total
drag on the model through a sting balance mount. This testing shows that the
drag on the model is reduced by 14% at Re = 41,400. However it also shows that as velocity increased, the
drag reduction is reduced and ultimately negated at Re = 124,200 with no
drag loss at all.
The addition of tabs as a passive flow control device did eliminate vortex shedding and alter the base pressure of the bluff
body. This particular model however showed no reduction in total
drag on the model at high Reynolds numbers higher than 124,000. Further study is necessary to isolate the exact geometry and flow velocities that should be able to produce more favorable
drag results for a bluff
body with this type of passive flow control device.
Advisors/Committee Members: Jin Tso.
Subjects/Keywords: wind tunnel testing bluff body drag reduction; Aerodynamics and Fluid Mechanics
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pinn, J. M. (2012). Effect of End-Plate Tabs on Drag Reduction of a 3D Bluff Body with a Blunt Base. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/698 ; 10.15368/theses.2012.16
Chicago Manual of Style (16th Edition):
Pinn, Jarred Michael. “Effect of End-Plate Tabs on Drag Reduction of a 3D Bluff Body with a Blunt Base.” 2012. Masters Thesis, Cal Poly. Accessed January 21, 2021.
https://digitalcommons.calpoly.edu/theses/698 ; 10.15368/theses.2012.16.
MLA Handbook (7th Edition):
Pinn, Jarred Michael. “Effect of End-Plate Tabs on Drag Reduction of a 3D Bluff Body with a Blunt Base.” 2012. Web. 21 Jan 2021.
Vancouver:
Pinn JM. Effect of End-Plate Tabs on Drag Reduction of a 3D Bluff Body with a Blunt Base. [Internet] [Masters thesis]. Cal Poly; 2012. [cited 2021 Jan 21].
Available from: https://digitalcommons.calpoly.edu/theses/698 ; 10.15368/theses.2012.16.
Council of Science Editors:
Pinn JM. Effect of End-Plate Tabs on Drag Reduction of a 3D Bluff Body with a Blunt Base. [Masters Thesis]. Cal Poly; 2012. Available from: https://digitalcommons.calpoly.edu/theses/698 ; 10.15368/theses.2012.16
University of Miami
5.
Bartow, William.
Experimental Investigations of Base Drag Reduction Using Passive Jet Flow Control.
Degree: MS, Mechanical Engineering (Engineering), 2014, University of Miami
URL: https://scholarlyrepository.miami.edu/oa_theses/516
► This study is focused on the experimental investigation of an extended rear view mirror and the development of near-wake flow in an effort to…
(more)
▼ This study is focused on the experimental investigation of an extended rear view mirror and the development of near-wake flow in an effort to reduce the overall base pressure
drag of the model. The passive flow control technique was employed through a circumferential slot of the rearward facing edge of a bluff
body to deliver a passive jet in the direction of the free stream. The passive jet employs the surrounding high energy free stream air through an intake slot in the front of the model in order to enhance the mixing layer of the immediate wake region in addition to energizing the wake area flow through entrainment. These effects subsequently caused a reduction of the effects of adverse pressure gradients that are associated with separation of the free stream shear layer over the over the passive jet model surface. The jet produced along the rear surface not only increased the turbulence of the mixing layer, but can also be directly tied to the coherent nature of the wake area flow. Using Two Dimensional Two Component (2D2C) in addition to Two Dimensional Three component (2D3C) Particle Image Velocimetry applied to our model in an open circuit wind tunnel, results show a substantial reduction in the overall wake area for which we attribute to the enhancements due to mixing effects of the passive jet interacting with the free stream shear layer. Flow entrainment from enhanced vorticity through the production coherent structures are believed to initiate the mixing layer earlier, in addition to increase the growth rate of the mixing layer while also attributing to the increase in the overall shear layer thickness as well. Particle Image Velocimetry (PIV) was carried out on an automobile mirror model with three configurations in order to investigate the effects of a baseline model including the absence of a passive jet mixing, a modified model including a small area circumferential jet and a heavily modified model including a large circumferential slot area jet. In combination with PIV, Partial Orthogonal Decomposition (POD) also referred to as the Karhunen Loeve expansion, was also applied in order to analyze the underlying large scale structures and dominant behaviors that would otherwise be hard to identify in the immediate wake flow structure. The mirror models used for testing was designed and produced to provide three specific testing configurations, baseline, Jet 1 and Jet 2. In order to proceed with the testing of the mirror models, the design and manufacturing of a reinforced force balance mounting apparatus was necessary in order to provide a more rigid and secure platform to measure aerodynamic loads of the mirror and future designs. The nature of the new design includes multiple support location in order to more equally distribute the loading in addition to bearings to assist in experiments that require a rotation of the model in order to increase the angle with respect to the free steam flow.
Advisors/Committee Members: Gecheng Zha, Na Li, Wangda Zuo.
Subjects/Keywords: Passive Flow Control; Bluff Body; Drag Reduction; Automotive Mirror; Particle Image Velocimetry
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bartow, W. (2014). Experimental Investigations of Base Drag Reduction Using Passive Jet Flow Control. (Thesis). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_theses/516
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bartow, William. “Experimental Investigations of Base Drag Reduction Using Passive Jet Flow Control.” 2014. Thesis, University of Miami. Accessed January 21, 2021.
https://scholarlyrepository.miami.edu/oa_theses/516.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bartow, William. “Experimental Investigations of Base Drag Reduction Using Passive Jet Flow Control.” 2014. Web. 21 Jan 2021.
Vancouver:
Bartow W. Experimental Investigations of Base Drag Reduction Using Passive Jet Flow Control. [Internet] [Thesis]. University of Miami; 2014. [cited 2021 Jan 21].
Available from: https://scholarlyrepository.miami.edu/oa_theses/516.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bartow W. Experimental Investigations of Base Drag Reduction Using Passive Jet Flow Control. [Thesis]. University of Miami; 2014. Available from: https://scholarlyrepository.miami.edu/oa_theses/516
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
6.
Findanis, Nicholas.
Asymmetrical localised synthetic jets in three-dimensional flows over bluff and streamlined bodies.
Degree: Mechanical & Manufacturing Engineering, 2012, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/51833
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10500/SOURCE02?view=true
► Synthetic jet, a turbulent shear flow generated from an oscillating train of coalescing vortex rings having a time-averaged zero net mass flow rate, is generally…
(more)
▼ Synthetic jet, a turbulent shear flow generated from an oscillating train of coalescing vortex rings having a time-averaged zero net mass flow rate, is generally applied in a distributed manner. A distinctive method of applying synthetic jet technology, namely an asymmetrical localised synthetic jet, is developed with the aim of improving the aerodynamic performance and efficiency of three-dimensional bluff and streamlined bodies. Further, the use of an asymmetrical localised synthetic jet will contribute towards the deficiency of three-dimensional flow studies.Two main characteristics of unsteady three-dimensional fluid-structure interaction that produce
drag were investigated: flow separation of the boundary layer and the wake region. A bluff
body, an 80 mm side-supported sphere, was tested at a Reynolds number of 5 x 104 in a closed test section wind tunnel in the UNSW Aerodynamics Laboratory. Surface pressure measurements on the sphere showed a delay in flow separation and a reduction in
drag due to the synthetic jet. Wake survey data obtained using a five-hole pressure probe were used to formulate a set of guiding criteria resulting in a four step process to determine wake regions with reversal of flow. Pressure and vorticity contour plots showed that the synthetic jet increased the streamwise velocity component and decreased the size of the wake. Further, the wake region was characterised using non-standard definitions of displacement thickness, momentum thickness and shape factor to show that the synthetic jet decreases the energy loss in the wake. A surprising discovery was the ability of the synthetic jet to smooth the flow at the support-sphere junction.CFD modelling was applied to the bluff and streamlined bodies using an advanced commercial CFD package. The results agreed with the experimentally obtained data. Synthetic jet localisation produces marked differences in the flow field depending on the position of actuation. Interference
drag was sensitive to the asymmetry of the synthetic jet with the higher angles decreasing the entrainment into the sphere-support juncture. The synthetic jet angle of incidence was optimised experimentally using a NACA0012 airfoil with a cut-off wing. The optimal synthetic jet angle of 23o was used on a forward swept wing based on a NACA23012 profile. The localised synthetic jet was able to reduce the
drag and wing tip vorticity.Asymmetrical localised synthetic jet can be used strategically on three-dimensional bluff and streamlined bodies to inhibit flow separation, decrease reversal of flow in the wake region and reduce interference and induced
drag.
Advisors/Committee Members: Ahmed, Noor, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW, Page, John, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Boundary layer; Synthetic jet; Flow separation; Wake; Three-dimensional; Drag; Flow reversal; Aerodynamics; Bluff body; Streamlined body
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Findanis, N. (2012). Asymmetrical localised synthetic jets in three-dimensional flows over bluff and streamlined bodies. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/51833 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10500/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Findanis, Nicholas. “Asymmetrical localised synthetic jets in three-dimensional flows over bluff and streamlined bodies.” 2012. Doctoral Dissertation, University of New South Wales. Accessed January 21, 2021.
http://handle.unsw.edu.au/1959.4/51833 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10500/SOURCE02?view=true.
MLA Handbook (7th Edition):
Findanis, Nicholas. “Asymmetrical localised synthetic jets in three-dimensional flows over bluff and streamlined bodies.” 2012. Web. 21 Jan 2021.
Vancouver:
Findanis N. Asymmetrical localised synthetic jets in three-dimensional flows over bluff and streamlined bodies. [Internet] [Doctoral dissertation]. University of New South Wales; 2012. [cited 2021 Jan 21].
Available from: http://handle.unsw.edu.au/1959.4/51833 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10500/SOURCE02?view=true.
Council of Science Editors:
Findanis N. Asymmetrical localised synthetic jets in three-dimensional flows over bluff and streamlined bodies. [Doctoral Dissertation]. University of New South Wales; 2012. Available from: http://handle.unsw.edu.au/1959.4/51833 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10500/SOURCE02?view=true
7.
Josà Juliano Barbosa Gadelha.
Masculinos em MutaÃÃo: A Performance Drag Queen em Fortaleza.
Degree: Master, 2009, Universidade Federal do Ceará
URL: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4281
;
► Esta dissertaÃÃo demonstra como a experiÃncia drag queen ocorrente na cidade de Fortaleza, situada no nordeste brasileiro, constitui uma experiÃncia ritual e performÃtica que desafia…
(more)
▼ Esta dissertaÃÃo demonstra como a experiÃncia drag queen ocorrente na cidade de Fortaleza, situada no nordeste brasileiro, constitui uma experiÃncia ritual e performÃtica que desafia os limites dos binarismos de gÃnero e sexo alÃm de aproximar o que temos como sendo o mundo das artes ao que entendemos como sendo o mundo cotidiano. O trabalho de campo se fundamenta em observaÃÃes diretas nos locais que dÃo passagem a performance drag queen em Fortaleza tais como boates, bares e outras casas de show bem como na coleta de mais de 50 entrevistas, no estilo histÃria de vida, gravadas entre os anos de 2004 e 2007 com drag queens, transformistas, transexuais e travestis residentes na aludida cidade. Ao revelar o carÃter ritual/performÃtico da experiÃncia drag queen por meio de uma anÃlise daquilo que essas personagens denominam montagem, o autor conclui que um devir-artista à encontrado pelas drag queens sob o trajeto de certas liminaridades. O escopo teÃrico do trabalho se fundamenta na antropologia dos rituais, na etnoestÃtica, nos Performance Studies, na Queer Theory e na sociologia da agÃncia. A metodologia segue os rumos de uma metaetnografia em diÃlogo com a experiÃncia cartogrÃfica, desenvolvida por Gilles Deleuze e FÃlix Guattari.
This dissertation shows how the drag queen experience present in the city of Fortaleza, located in the Northeastern region of Brazil, consists of a ritualistic and performative experience which challenges the limits of the binary of gender and sex and also narrows what we understand as the world of arts and the everyday life. The field research is based on direct observations in the places where the drag queen performances happen in Fortaleza such as nightclubs, bars and other cabaret entertainment clubs, as well as on the collection of data in more than 50 interviews in life-story model recorded between the years 2004 and 2007 with drag queens, transformists, transsexuals and transvestites in this city. The ritualistic and performative aspects of the drag queen experience is evidenced through an analysis of what these characters name âmontagemâ (cross-dressing), the author can conclude that an becoming-artist can be found by the drag queens in the form of certain liminalities. The theoretical scope of this work is based on the anthropology of the ritual, the ethno-aesthetics, the Performance Studies, the Queer Theory and the sociology of agency. The methodology follows the steps of a meta-etnography in dialogue with the cartography experience, developed by Gilles Deleuze and FÃlix Guattari.
Advisors/Committee Members: Lea Carvalho Rodrigues, Gloria Maria dos Santos DiÃgenes, Elsje Maria Lagrou, Peregrina Fatima Capelo Cavalcante.
Subjects/Keywords: ANTROPOLOGIA; Corpo; Drag Queen; Montagem; Performance; Ritual; Body; Drag Queen; Cross-dressing; Performance; Ritual; Personificadores femininos - Fortaleza(CE); Travestis - Fortaleza(CE) - Atitudes; Travestismo - Fortaleza(CE); Desempenho
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gadelha, J. J. B. (2009). Masculinos em MutaÃÃo: A Performance Drag Queen em Fortaleza. (Masters Thesis). Universidade Federal do Ceará. Retrieved from http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4281 ;
Chicago Manual of Style (16th Edition):
Gadelha, Josà Juliano Barbosa. “Masculinos em MutaÃÃo: A Performance Drag Queen em Fortaleza.” 2009. Masters Thesis, Universidade Federal do Ceará. Accessed January 21, 2021.
http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4281 ;.
MLA Handbook (7th Edition):
Gadelha, Josà Juliano Barbosa. “Masculinos em MutaÃÃo: A Performance Drag Queen em Fortaleza.” 2009. Web. 21 Jan 2021.
Vancouver:
Gadelha JJB. Masculinos em MutaÃÃo: A Performance Drag Queen em Fortaleza. [Internet] [Masters thesis]. Universidade Federal do Ceará 2009. [cited 2021 Jan 21].
Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4281 ;.
Council of Science Editors:
Gadelha JJB. Masculinos em MutaÃÃo: A Performance Drag Queen em Fortaleza. [Masters Thesis]. Universidade Federal do Ceará 2009. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4281 ;
8.
Bonnavion, Guillaume.
Dynamics of the unstable wake modes in automotive aerodynamics : from simplified models to real vehicles : Dynamiques des modes instables de sillages en aérodynamique automobile : des modèles simplifiés aux véhicules réels.
Degree: Docteur es, Mécanique des fluides, 2018, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2018SACLY010
► Depuis la découverte des modes asymétriques dans le sillage d'un corps simplifié d'automobile, réminiscents d'une bifurcation à bas nombre de Reynolds, se posent des questions…
(more)
▼ Depuis la découverte des modes asymétriques dans le sillage d'un corps simplifié d'automobile, réminiscents d'une bifurcation à bas nombre de Reynolds, se posent des questions propres au développement aérodynamique des véhicules terrestres telles que l'influence du vent latéral, de l'assiette et du rétreint d'arrière-corps couramment utilisé en phase d'optimisation. Notre travail s'attache à répondre expérimentalement à ces questions pour des géométries simplifiées mais aussi réelles. Les essais sont réalisés en soufflerie industrielle à l'échelle 2/5 pour le corps académique et en pleine échelle pour les monospaces. Nous montrons que le désalignement du véhicule par rapport à l'écoulement incident n'a pour effet que de modifier l'orientation du mode asymétrique sans en changer l'intensité. Nous construisons un modèle simple prédisant non seulement cette orientation mais aussi les conséquences sur les efforts aérodynamiques transverses. La contribution de l'instabilité sur les coefficients aérodynamiques de portance ou d'effort latéral est de l'ordre de 0,02 indépendamment du vent de travers et de l'assiette du véhicule. Les rétreints d'arrière-corps affectent également la dynamique du sillage et son orientation, mais l'instabilité n'est jamais supprimée. Ces résultats sont retrouvés pour des véhicules réels de type monospace dont le sillage est donc également soumis au même mode asymétrique, révélé sans ambigüité par des expériences de sensibilité en assiette. Nos résultats indiquent que, pour tous les véhicules considérés, le mode asymétrique de sillage est systématiquement présent dans l'enveloppe de conduite. Le contrôle ou la suppression de ce mode devrait offrir de nouvelles perspectives d'optimisation des véhicules à culot droit de type monospaces ou SUV.
Since the recent discovery of asymmetric modes in the wake of a simplified vehicle geometry, reminiscent from a bifurcation at low Reynolds numbers, some questions related to the aerodynamic development of ground vehicles such as the influence of lateral wind, pitch and afterbody boat-tail classically used during shape optimization remain unanswered. Our work is devoted to assess those questions experimentally for simplified but also real geometries. The tests are conducted in an industrial wind-tunnel, at the 2/5-scale for the academic body and at the full scale for the minivans. We show that the vehicle's misalignment only modifies the asymmetric mode's orientation without affecting its intensity. We build a model predicting not only this orientation but also the consequences on the cross-flow aerodynamic loading. The contribution of the instability to the lift or side force coefficients is of the order of 0,02 independently of lateral wind or of the vehicle's pitch. Afterbody boat-tails also impact the wake dynamics and its orientation but the instability is never suppressed. These results are retrieved for real vehicles such as minivans, whose wake is then subjected to the same asymmetric mode as well, revealed unambiguously with pitch sensitivity…
Advisors/Committee Members: Cadot, Olivier (thesis director), Sipp, Denis (thesis director).
Subjects/Keywords: Ecoulements avec sillage; Ecoulements turbulents; Réduction de traînée; Stabilité; Corps non profilé; Wake flows; Turbulent flows; Drag reduction; Statibility; Bluff body
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bonnavion, G. (2018). Dynamics of the unstable wake modes in automotive aerodynamics : from simplified models to real vehicles : Dynamiques des modes instables de sillages en aérodynamique automobile : des modèles simplifiés aux véhicules réels. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2018SACLY010
Chicago Manual of Style (16th Edition):
Bonnavion, Guillaume. “Dynamics of the unstable wake modes in automotive aerodynamics : from simplified models to real vehicles : Dynamiques des modes instables de sillages en aérodynamique automobile : des modèles simplifiés aux véhicules réels.” 2018. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed January 21, 2021.
http://www.theses.fr/2018SACLY010.
MLA Handbook (7th Edition):
Bonnavion, Guillaume. “Dynamics of the unstable wake modes in automotive aerodynamics : from simplified models to real vehicles : Dynamiques des modes instables de sillages en aérodynamique automobile : des modèles simplifiés aux véhicules réels.” 2018. Web. 21 Jan 2021.
Vancouver:
Bonnavion G. Dynamics of the unstable wake modes in automotive aerodynamics : from simplified models to real vehicles : Dynamiques des modes instables de sillages en aérodynamique automobile : des modèles simplifiés aux véhicules réels. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2018. [cited 2021 Jan 21].
Available from: http://www.theses.fr/2018SACLY010.
Council of Science Editors:
Bonnavion G. Dynamics of the unstable wake modes in automotive aerodynamics : from simplified models to real vehicles : Dynamiques des modes instables de sillages en aérodynamique automobile : des modèles simplifiés aux véhicules réels. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2018. Available from: http://www.theses.fr/2018SACLY010
Delft University of Technology
9.
Undetermined, U. (author).
Aerodynamic Analysis of Drag Reduction Devices for the Tractor-Trailer Gap.
Degree: 2016, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:4957a03c-bc37-4173-8a14-b05f277e35e4
Aerospace Engineering
Aerodynamics
Advisors/Committee Members: Van Zuijlen, A.H. (mentor).Subjects/Keywords: tractor-trailer; gap; bluff body; drag reduction; crosswind
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Undetermined, U. (. (2016). Aerodynamic Analysis of Drag Reduction Devices for the Tractor-Trailer Gap. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:4957a03c-bc37-4173-8a14-b05f277e35e4
Chicago Manual of Style (16th Edition):
Undetermined, U (author). “Aerodynamic Analysis of Drag Reduction Devices for the Tractor-Trailer Gap.” 2016. Masters Thesis, Delft University of Technology. Accessed January 21, 2021.
http://resolver.tudelft.nl/uuid:4957a03c-bc37-4173-8a14-b05f277e35e4.
MLA Handbook (7th Edition):
Undetermined, U (author). “Aerodynamic Analysis of Drag Reduction Devices for the Tractor-Trailer Gap.” 2016. Web. 21 Jan 2021.
Vancouver:
Undetermined U(. Aerodynamic Analysis of Drag Reduction Devices for the Tractor-Trailer Gap. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2021 Jan 21].
Available from: http://resolver.tudelft.nl/uuid:4957a03c-bc37-4173-8a14-b05f277e35e4.
Council of Science Editors:
Undetermined U(. Aerodynamic Analysis of Drag Reduction Devices for the Tractor-Trailer Gap. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:4957a03c-bc37-4173-8a14-b05f277e35e4
Indian Institute of Science
10.
Pritam Giri, *.
Power Loss Minimization for Drag Reduction and Self-Propulsion using Surface Mass Transpiration.
Degree: PhD, Faculty of Engineering, 2017, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/2835
► The remarkable efficacy with which normal surface mass transpiration (blowing and suction) alters a given base flow to achieve a desired predefined objective has motivated…
(more)
▼ The remarkable efficacy with which normal surface mass transpiration (blowing and suction) alters a given base flow to achieve a desired predefined objective has motivated several investigations on
drag reduction, self-propulsion and suppression of separation and wake unsteadiness in bluff
body flows. However, the energetic efficiency, a critical parameter that determines the true efficacy and in particular practical feasibility of this control strategy, has received significantly less attention. In this work, we determine the optimal zero net mass transpiration blowing and suction profiles that minimize net power consumption while reducing
drag or enabling self-propulsion in typical bluff
body flows. We establish the influence of prescribed blowing and suction profiles on the hydrodynamic loads and net power consumption for a representative bluff
body flow involving flow past a stationary two-dimensional circular cylinder. Using analysis based on Oseen’s equations, we find that all the symmetric modes, except the first one, lead to an increase in the net power consumption without affecting hydrodynamic
drag. The optimal blowing and suction profile that yields minimum power consumption is such that the normal stress acting on the cylinder surface vanishes identically. Furthermore, we show that a self-propelling state corresponding to zero net
drag force is attained when the first mode of blowing and suction profile is such that the flow field be-comes irrigational. Based on these findings we employ direct numerical simulation tools to decipher the Reynolds number dependence of the optimal profiles and the associated power consumption for both
drag reduction and self-propulsion. For a typical Reynolds number, the time-averaged
drag coefficient first decreases due to vortex shedding suppression, then increases and eventually decreases again after attaining a local maximum as the strength of the first mode is increased. The net power consumption continues to decrease with an increase in the strength of the first mode before reaching a minima after which it rises continuously. For a Reynolds number of 1000 over fifteen fold reduction in
drag is achieved for an optimal blowing and suction profile with a maximum radial surface velocity that is nearly 1.97 times the free stream velocity.
Next, to establish whether or not higher modes play a role in decreasing net power consumption at finite Reynolds number, we perform theoretical analysis of a configuration similar to the one described above for a spherical
body. At zero Reynolds number, as a result of mode independence, we show that surface blow-ing and suction of any form that involves second or higher order axisymmetric or non-axisymmetric modes does not contribute to
drag and only leads to an increase in total power consumption. However, at finite Reynolds number, using analysis based on Oseen’s equations, we find that the second and higher modes contribute substantially to the optimal profiles. Finally to understand the effects of a change in shape we consider…
Advisors/Committee Members: Shukla, R K (advisor).
Subjects/Keywords: Drag Reduction; Surface Mass Transpiration; Bluff Body Flows; Hydrodynamic Drags; Towing; Self-propulsion; Suction; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pritam Giri, *. (2017). Power Loss Minimization for Drag Reduction and Self-Propulsion using Surface Mass Transpiration. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2835
Chicago Manual of Style (16th Edition):
Pritam Giri, *. “Power Loss Minimization for Drag Reduction and Self-Propulsion using Surface Mass Transpiration.” 2017. Doctoral Dissertation, Indian Institute of Science. Accessed January 21, 2021.
http://etd.iisc.ac.in/handle/2005/2835.
MLA Handbook (7th Edition):
Pritam Giri, *. “Power Loss Minimization for Drag Reduction and Self-Propulsion using Surface Mass Transpiration.” 2017. Web. 21 Jan 2021.
Vancouver:
Pritam Giri *. Power Loss Minimization for Drag Reduction and Self-Propulsion using Surface Mass Transpiration. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2017. [cited 2021 Jan 21].
Available from: http://etd.iisc.ac.in/handle/2005/2835.
Council of Science Editors:
Pritam Giri *. Power Loss Minimization for Drag Reduction and Self-Propulsion using Surface Mass Transpiration. [Doctoral Dissertation]. Indian Institute of Science; 2017. Available from: http://etd.iisc.ac.in/handle/2005/2835
University of Lund
11.
Lööv, Anna Olovsdotter.
Maskulinitet i feminismens tjänst. Dragkingande som
praktik, politik och begär.
Degree: 2014, University of Lund
URL: https://lup.lub.lu.se/record/4276254
;
https://portal.research.lu.se/ws/files/5838833/4276258.pdf
► Masculinity in the service of feminism. Drag kinging as practice, politics, and desire. The aim of the thesis is to explore drag kinging as lived…
(more)
▼ Masculinity in the service of feminism. Drag
kinging as practice, politics, and desire. The aim of the thesis is
to explore drag kinging as lived experience at the crossroads of
masculinity, the body, and feminist politics. Drag kinging is
defined as a conscious performance of masculinity. Theoretically,
the study takes a feminist and queer phenomenological perspective
as a point of departure. In particular, it draws on Sara Ahmed’s
and Iris Marion Young’s work on the gendered and queer body and its
orientation in space. Following the work of Nira Yuval-Davis, drag
kinging is conceptualized as a feminist epistemic community, a
space for knowledge production and belonging for individuals
sharing feminist emancipatory values. Methodologically, the study
is inspired by feminist critical ethnography. It is based on
interviews with individuals that do drag kinging and participatory
observations as an observant participant in drag king contexts. My
material shows that through the practice of drag kinging the
informants experience moments of wonder that expand and deepen
their feminist understandings. The emotional regime of drag kinging
is oriented around an ethics of care, a feeling of wonder,
individual agency, and the hope for the possibility for change –
both on a personal and societal level. Drag kings evolve in my
analysis as sticky objects saturated with desire from many
different others, and also as desiring different others. Public
spaces are experienced as powerful venues for doing politics, but
are also spaces where drag kings become vulnerable. The drag king
workshop is the primary method for expanding the epistemic
community of drag kinging and for transversal politics. In
workshops in hetero-cultural contexts drag kinging as a queer and
feminist practice is under-communicated and drag kinging runs the
risk of heterosexualization and depoliticization. The risk of
obscuring unequal relations of power, reproducing stereotypes and
the problematic need of continuous recognition from the mainstream
is highlighted. My material shows that despite its shortcomings,
drag kinging provides a serious challenge to gender norms, and
creates a space for the subversion and challenge of hegemonic
definitions of femininity and masculinity. It also provides a sense
of political meaningfulness regarding societal transformations both
at the individual and the collective level.
Subjects/Keywords: Gender Studies; drag king; queer; queer phenomenology; epistemic community; feminism; queer activism; critical feminist ethnography; empowerment; the body; desire.
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lööv, A. O. (2014). Maskulinitet i feminismens tjänst. Dragkingande som
praktik, politik och begär. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/4276254 ; https://portal.research.lu.se/ws/files/5838833/4276258.pdf
Chicago Manual of Style (16th Edition):
Lööv, Anna Olovsdotter. “Maskulinitet i feminismens tjänst. Dragkingande som
praktik, politik och begär.” 2014. Doctoral Dissertation, University of Lund. Accessed January 21, 2021.
https://lup.lub.lu.se/record/4276254 ; https://portal.research.lu.se/ws/files/5838833/4276258.pdf.
MLA Handbook (7th Edition):
Lööv, Anna Olovsdotter. “Maskulinitet i feminismens tjänst. Dragkingande som
praktik, politik och begär.” 2014. Web. 21 Jan 2021.
Vancouver:
Lööv AO. Maskulinitet i feminismens tjänst. Dragkingande som
praktik, politik och begär. [Internet] [Doctoral dissertation]. University of Lund; 2014. [cited 2021 Jan 21].
Available from: https://lup.lub.lu.se/record/4276254 ; https://portal.research.lu.se/ws/files/5838833/4276258.pdf.
Council of Science Editors:
Lööv AO. Maskulinitet i feminismens tjänst. Dragkingande som
praktik, politik och begär. [Doctoral Dissertation]. University of Lund; 2014. Available from: https://lup.lub.lu.se/record/4276254 ; https://portal.research.lu.se/ws/files/5838833/4276258.pdf
Indian Institute of Science
12.
Suryanarayana, G K.
On The Reduction Of Drag Of a Sphere By Natural Ventilation.
Degree: PhD, Faculty of Engineering, 2005, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/125
► The problem of bluff body flows and the drag associated with them has been the subject of numerous investigations in the literature. In the two-dimensional…
(more)
▼ The problem of bluff
body flows and the
drag associated with them has been the
subject of numerous investigations in the literature. In the two-dimensional case, the flow past a circular cylinder has been most widely studied both experimentally and computationally. As a result, a well documented understanding of the gross features of the near-wake around a circular cylinder exists in the literature. In contrast, very little is understood on the general features of three-dimensional bluff
body near-wakes, except that the vortex shedding is known to be less intense.
Control or management of bluff
body flows, both from the point of view of
drag reduction as well as suppressing unsteady forces caused by vortex shedding, has been an area of considerable interest in engineering applications. The basic aim in the different control methods involves direct or indirect manipulation (or modification) of the near-wake structure leading to weakening or inhibition of vortex shedding. Many passive and energetic techniques (such as splitter plates, base and trailing edge modifications and base bleed) have been effective in the two-dimensional case in increasing the base pressure, leading to varying amounts of
drag reduction; a large
body of this work is centered around circular cylinders because of direct relevance in applications.
The present work is an attempt to understand some of the major aspects of the near-wake structure of a sphere and to control the same for
drag reduction employing a passive technique. Many of the passive control techniques found useful in two-dimensional flows are not appropriate in the context of a sphere. In this thesis, the effects of natural ventilation on the wake and
drag of a sphere at low speeds have been studied experimentally in some detail. Natural bleed into the base is created when the stagnation and base regions of a sphere are connected through an internal duct. Although natural ventilation has features broadly similar to the well known base-bleed technique (both involve addition of mass, momentum and energy into the near-wake), there are many significant differences between the two methods; for example, in base bleed, the mass flow injected can be controlled independent of the outer flow, whereas in natural ventilation, it is determined by an interaction between the internal and the external flow around the
body.
Experiments have been conducted in both wind and water tunnels, which covered a wide range of Reynolds number (ReDj based on the diameter of the sphere) from of 1.7 x 103 to 8.5 x 105 with natural boundary layer transition. The ratio of the frontal vent area to the maximum cross sectional area of the sphere was varied from 1% to 2.25% and the effect of the internal duct geometry, including a convergent and a divergent duct was examined as well. After preliminary force measurements involving different duct geometries and vent areas, it was decided to make detailed measurements with a straight (parallel) duct with a vent area ratio of 2.25%. Extensive flow visualization studies…
Advisors/Committee Members: Prabhu, A (advisor), Viswanath, P R (advisor).
Subjects/Keywords: Fluid and Plasma Physics; Drag (Aeronautics); Sphere-Drag (Aerodynamics); Drag reduction; flow visualization; bluff body flows; vortex shedding
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Suryanarayana, G. K. (2005). On The Reduction Of Drag Of a Sphere By Natural Ventilation. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/125
Chicago Manual of Style (16th Edition):
Suryanarayana, G K. “On The Reduction Of Drag Of a Sphere By Natural Ventilation.” 2005. Doctoral Dissertation, Indian Institute of Science. Accessed January 21, 2021.
http://etd.iisc.ac.in/handle/2005/125.
MLA Handbook (7th Edition):
Suryanarayana, G K. “On The Reduction Of Drag Of a Sphere By Natural Ventilation.” 2005. Web. 21 Jan 2021.
Vancouver:
Suryanarayana GK. On The Reduction Of Drag Of a Sphere By Natural Ventilation. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2005. [cited 2021 Jan 21].
Available from: http://etd.iisc.ac.in/handle/2005/125.
Council of Science Editors:
Suryanarayana GK. On The Reduction Of Drag Of a Sphere By Natural Ventilation. [Doctoral Dissertation]. Indian Institute of Science; 2005. Available from: http://etd.iisc.ac.in/handle/2005/125
RMIT University
13.
Chowdhury, M.
Aerodynamics of sports fabrics and garments.
Degree: 2012, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:160236
► In this day and age, specially designed garments are widely used in all sports. The understanding of aerodynamic behaviour of such sports garments can lead…
(more)
▼ In this day and age, specially designed garments are widely used in all sports. The understanding of aerodynamic behaviour of such sports garments can lead to achieve better performance. Despite some preliminary studies on aerodynamics of sports garments been undertaken, no correlation between aerodynamic drag and lift, and fabric surface profile was established. This research aims to address this gap. In order to establish a relationship between aerodynamic parameters (drag and lift coefficients, Reynolds number) and garment constraints (surface roughness, orientation of wale and course, seam configuration and placement), a standard cylinder testing (macro-scale) methodology for fabrics is developed by considering the athlete body as a combination of cylinders and isolating the influence other than garments. Additionally, to correlate the cylinder test data with full-scale measurements, two full-scale experimental setups (for ski jumping and cycling) are developed. Multiple garment fabrics with varied surface profiles have been investigated over a range of Reynolds number (Re) varied by wind speeds using macro-scale and full-scale experimental setups. Based on cylinder test data, a correlation between the aerodynamic drag coefficient (C D ) and relative roughness (ε = 2.58 × 10 _4 to 7.38 × 10 _4 ) for fabrics over a range of Reynolds numbers (1.0 × 10 5 to 2.4 × 10 5 ) has been determined. Additionally, a functional relationship between CD and Re (1.4 × 10 5 to 1.8 × 10 5 ) for seam orientations (0° to 180° relative to wind direction) is developed. The effect of surface roughness at inclined position (30° to 125°) indicates that rougher surfaces (ε = 5.42 × 10 _4 ) generate a flow transition at low Re (0.4 × 10 5 ) than the smoother surface (ε = 4.73 × 10 _4 ). Data from the macro-scale testing correlate well with the full-scale measurements. Experimental methodologies and functional relationships developed in this study allow determining appropriate garment for a specific sport to achieve aerodynamic benefit.
Subjects/Keywords: Fields of Research; Aerodynamics; sports; fabrics; garments; textile; cycling; ski-jumping; experimental; wind tunnel; drag; lift; angle of attack; cylindrical methodology; full-scale; Reynolds numbers; sports apparel; body position
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chowdhury, M. (2012). Aerodynamics of sports fabrics and garments. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:160236
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chowdhury, M. “Aerodynamics of sports fabrics and garments.” 2012. Thesis, RMIT University. Accessed January 21, 2021.
http://researchbank.rmit.edu.au/view/rmit:160236.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chowdhury, M. “Aerodynamics of sports fabrics and garments.” 2012. Web. 21 Jan 2021.
Vancouver:
Chowdhury M. Aerodynamics of sports fabrics and garments. [Internet] [Thesis]. RMIT University; 2012. [cited 2021 Jan 21].
Available from: http://researchbank.rmit.edu.au/view/rmit:160236.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chowdhury M. Aerodynamics of sports fabrics and garments. [Thesis]. RMIT University; 2012. Available from: http://researchbank.rmit.edu.au/view/rmit:160236
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Connecticut
14.
Footit, Allison.
Grotesque Drag Queens and Toxic Matriarchs: Motherhood and The Subversive Female Body in Disney Animated Films.
Degree: MA, Art History, 2013, University of Connecticut
URL: https://opencommons.uconn.edu/gs_theses/419
Subjects/Keywords: Disney; queer theory; subversive; female; body; Gothel; Rapunzel; Ariel; Ursula; drag; camp; feminism
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Footit, A. (2013). Grotesque Drag Queens and Toxic Matriarchs: Motherhood and The Subversive Female Body in Disney Animated Films. (Masters Thesis). University of Connecticut. Retrieved from https://opencommons.uconn.edu/gs_theses/419
Chicago Manual of Style (16th Edition):
Footit, Allison. “Grotesque Drag Queens and Toxic Matriarchs: Motherhood and The Subversive Female Body in Disney Animated Films.” 2013. Masters Thesis, University of Connecticut. Accessed January 21, 2021.
https://opencommons.uconn.edu/gs_theses/419.
MLA Handbook (7th Edition):
Footit, Allison. “Grotesque Drag Queens and Toxic Matriarchs: Motherhood and The Subversive Female Body in Disney Animated Films.” 2013. Web. 21 Jan 2021.
Vancouver:
Footit A. Grotesque Drag Queens and Toxic Matriarchs: Motherhood and The Subversive Female Body in Disney Animated Films. [Internet] [Masters thesis]. University of Connecticut; 2013. [cited 2021 Jan 21].
Available from: https://opencommons.uconn.edu/gs_theses/419.
Council of Science Editors:
Footit A. Grotesque Drag Queens and Toxic Matriarchs: Motherhood and The Subversive Female Body in Disney Animated Films. [Masters Thesis]. University of Connecticut; 2013. Available from: https://opencommons.uconn.edu/gs_theses/419
Harvard University
15.
Lucas, Kelsey Noelle.
Physical Mechanisms of Force Production for Swimming in Fishes.
Degree: PhD, 2019, Harvard University
URL: http://nrs.harvard.edu/urn-3:HUL.InstRepos:42029628
► Fishes must swim effectively to perform many behaviors that are important for evolutionary fitness. So, understanding how a fish’s body morphology, mechanical properties, and movements…
(more)
▼ Fishes must swim effectively to perform many behaviors that are important for evolutionary fitness. So, understanding how a fish’s
body morphology, mechanical properties, and movements combine to enable swimming can provide insight into the evolution of their present
body forms. Here, I use physical models and experimental fluid dynamics to study the relationships between fish
body properties and swimming performance.
The first section of this dissertation centers on the contributions the body’s flexural stiffness makes to overall swimming performance. In my previous work, I found that many swimming and flying animals, including fishes, bend their bodies and appendages in a similar way during steady locomotion in part due to non-uniform flexural stiffness in their propulsive structures. In Chapter 1, I use a simple physical modeling system to isolate the effects of flexural stiffness from the complexity of a fish
body. Using versions of the simple model with different flexural stiffnesses, I show that having non-uniform stiffness along the
body length leads to faster, more efficient swimming. I extend these results in Appendix I, where I compare several tuna-tail-shaped models of different stiffnesses and find that certain combinations of stiffness and fish-like movements improves swimming ability. The findings indicate that the non-uniform physical properties of different components of a fish’s
body are paramount for maintaining high overall swimming performance, and I hypothesize that fish may be controlling their
body stiffness and movements to achieve performance benefits.
In the second section of my dissertation, I focus on how the fish’s
body interacts with the surrounding water to create swimming forces. In the past, our understanding of these interactions has been limited by the difficulty of measuring forces in a fluid medium. Therefore, in Chapter 2, I develop and validate new tools that allow me to estimate these forces at high spatial and temporal resolution using a pressure-based approach. I then apply these tools in Chapter 3 to describe how carangiform swimmers – fishes swimming using only their bodies and caudal fins and undulate only the posterior portion of the
body at large amplitudes – generate swimming forces. I find that both positive and negative pressure contribute to thrust and
drag. Further, in contrast to previous hypotheses, I find that carangiform fishes generate both thrust and
drag along much of the length of their bodies in complex temporal patterns. I conclude by describing how subtle differences between different carangiform swimmers’ movements and
body shape lead to significant differences in force production.
Taken together, my results suggest that fishes may simultaneously use a variety of mechanisms to produce swimming forces, and identifies specific
body features and movements which dictate swimming abilities. Future work will continue to explore the relationships between
body morphology, material properties, and swimming abilities, and to apply this knowledge…
Advisors/Committee Members: Tytell, Eric (advisor), Biewener, Andrew (committee member), Holbrook, N. Michele (committee member).
Subjects/Keywords: fish; fishes; swimming; biomechanics; biofluid dynamics; biological fluid dynamics; body stiffness; flexural stiffness; flapping foils; hydrofoils; force; pressure; pressure-based force calculation; force calculation; swimming forces; thrust; drag
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lucas, K. N. (2019). Physical Mechanisms of Force Production for Swimming in Fishes. (Doctoral Dissertation). Harvard University. Retrieved from http://nrs.harvard.edu/urn-3:HUL.InstRepos:42029628
Chicago Manual of Style (16th Edition):
Lucas, Kelsey Noelle. “Physical Mechanisms of Force Production for Swimming in Fishes.” 2019. Doctoral Dissertation, Harvard University. Accessed January 21, 2021.
http://nrs.harvard.edu/urn-3:HUL.InstRepos:42029628.
MLA Handbook (7th Edition):
Lucas, Kelsey Noelle. “Physical Mechanisms of Force Production for Swimming in Fishes.” 2019. Web. 21 Jan 2021.
Vancouver:
Lucas KN. Physical Mechanisms of Force Production for Swimming in Fishes. [Internet] [Doctoral dissertation]. Harvard University; 2019. [cited 2021 Jan 21].
Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:42029628.
Council of Science Editors:
Lucas KN. Physical Mechanisms of Force Production for Swimming in Fishes. [Doctoral Dissertation]. Harvard University; 2019. Available from: http://nrs.harvard.edu/urn-3:HUL.InstRepos:42029628
KTH
16.
Brundin, Desirée.
An Experimental Study of the High-Lift System and Wing-Body Junction Wake Flow Interference of the NASA Common Research Model.
Degree: Optimization and Systems Theory, 2017, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209242
► This thesis investigates the turbulent flow in the wake of the wing-body junction of the NASA Common Research Model to further reveal its complex…
(more)
▼ This thesis investigates the turbulent flow in the wake of the wing-body junction of the NASA Common Research Model to further reveal its complex vortical structure and to contribute to the reference database used for Computational Fluid Dynamics validation activities. Compressible flows near two wall-boundary layers occurs not only at the wing-body junction but at every control surface of an airplane, therefore increased knowledge about this complex flow structure could potentially improve the estimates of drag performance and control surface efficiency, primarily for minimizing the environmental impact of commercial flight. The airplane model is modified by adding an inboard flap to investigate the influence from the deflection on the vorticity and velocity field. Future flap designs and settings are discussed from a performance improvement point of view, with the investigated flow influence in mind. The experimental measurements for this thesis were collected using a Cobra Probe, a dynamic multi-hole pressure probe, for Reynolds numbers close to one million based on the wing root chord. A pre-programmed three-dimensional grid was used to cover the most interesting parts of the junction flow. The facility used for the tests is a 120 cm by 80 cm indraft, subsonic wind tunnel at NASA Ames Research Center’s Fluid Mechanics Lab, which provides an on-set flow speed of around Mach 0.15, corresponding to approximately 48 m/s.
Den här avhandlingen undersöker det turbulenta flödet runt övergången mellan flygplanskropp och vinge på en NASA Common Research Model för att vidare utforska den komplexa, tredimensionella strukturen av flödet och bidra till NASA’s officiella databas för jämförelser med simulerade flöden. Kompressibla flöden nära tvåväggsgränsskikt uppkommer inte bara vid övergången mellan flygplanskropp och vinge utan även vid varje kontrollyta på ett flygplan. Ökad kunskap om flödets beteende vid sådana områden kan därför bidra till en bättre uppskattning av prestanda och effektivitet av kontrollytorna och flygplanet i sin helhet, vilket kan bidra till minskad miljöpåverkan från kommersiell flygtrafik. Flygplansmodellen är modifierad genom montering av en vingklaff på den inre delen av vingen, detta för att undersöka hur olika vinklar på klaffarnas nedböjning påverkar flödets struktur och hastighetsfält. Framtida klaffdesigner och inställningar för ökad prestanda diskuteras även utifrån denna påverkan. Mätningarna i vindtunneln gjordes med en Cobra Probe, ett dynamisk tryckmätningsinstrument, speciellt designad för turbulenta och instabila flöden. Reynoldsnumren som generades av den subsoniska, indrags-vindtunneln var ungefär en miljon baserad på vingrotens längd, vilket motsvarar knappt en tiondel av normala flygförhållanden för samma flygplansmodell.
Subjects/Keywords: Common research model; wind tunnel experiments; subsonic flow; wing-body junction; commercial aircraft; Cobra Probe measurements; high-lift control systems; flow interference; drag estimate.; Computational Mathematics; Beräkningsmatematik
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brundin, D. (2017). An Experimental Study of the High-Lift System and Wing-Body Junction Wake Flow Interference of the NASA Common Research Model. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209242
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brundin, Desirée. “An Experimental Study of the High-Lift System and Wing-Body Junction Wake Flow Interference of the NASA Common Research Model.” 2017. Thesis, KTH. Accessed January 21, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209242.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brundin, Desirée. “An Experimental Study of the High-Lift System and Wing-Body Junction Wake Flow Interference of the NASA Common Research Model.” 2017. Web. 21 Jan 2021.
Vancouver:
Brundin D. An Experimental Study of the High-Lift System and Wing-Body Junction Wake Flow Interference of the NASA Common Research Model. [Internet] [Thesis]. KTH; 2017. [cited 2021 Jan 21].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209242.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brundin D. An Experimental Study of the High-Lift System and Wing-Body Junction Wake Flow Interference of the NASA Common Research Model. [Thesis]. KTH; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209242
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
17.
Kolbeinsson, Ari.
Mind the gap : Extending the body into 3d environments using 2d tools for interaction.
Degree: Humanities and Informatics, 2011, University of Skövde
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5279
► This thesis is a literature study on how existing research on embodied tool use may support the use of the use of the computer…
(more)
▼ This thesis is a literature study on how existing research on embodied tool use may support the use of the use of the computer mouse within three dimensional environments, followed by an analysis of a typical scenario in the use of three dimensional environment. Problems with interaction in this domain are well known to designers of 3d programs but not well understood, which results in programs in which mouse controllers are used to control three dimensional objects being more difficult to learn and less efficient to use than would be possible if the interaction was better understood. The problems are often identified by their symptoms, such as the drag-threshold problem, picking problem, and the object rotation/viewpoint management problem, but this thesis will explore what the cause of those problems is, and identifies them all as a single cognitive problem which is found to be caused by a rift between the functioning of the two dimensional tool in use (the mouse and cursor) and the simulated three dimensional environment with which the cursor is interacting. Analyses are performed on a scenario, and result in a pinpointing of the problem and possible solutions to the interaction part of the problem (with design guidelines emerging), as well as finding the possibility that the cognitive roots of the problem result from an incompatibility between body-schema frames of reference for movement between the two dimensional parts of the action and the three dimensional part of the action.
Subjects/Keywords: Interaction; virtual environments; tool use; embodied cognition; body schema; picking problem; drag-threshold problem; six axis; 3d mouse; Flatland; Computer Sciences; Datavetenskap (datalogi)
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kolbeinsson, A. (2011). Mind the gap : Extending the body into 3d environments using 2d tools for interaction. (Thesis). University of Skövde. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5279
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kolbeinsson, Ari. “Mind the gap : Extending the body into 3d environments using 2d tools for interaction.” 2011. Thesis, University of Skövde. Accessed January 21, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5279.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kolbeinsson, Ari. “Mind the gap : Extending the body into 3d environments using 2d tools for interaction.” 2011. Web. 21 Jan 2021.
Vancouver:
Kolbeinsson A. Mind the gap : Extending the body into 3d environments using 2d tools for interaction. [Internet] [Thesis]. University of Skövde; 2011. [cited 2021 Jan 21].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5279.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kolbeinsson A. Mind the gap : Extending the body into 3d environments using 2d tools for interaction. [Thesis]. University of Skövde; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5279
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
18.
Van Raemdonck, G.M.R.
Design of Low Drag Bluff Road Vehicles.
Degree: 2012, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23
;
urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23
;
urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23
;
http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23
► Low drag bluff road vehicle design can be obtained effectively and efficiently with a three phase approach that uses numerical simulations, scaled wind tunnel experiments…
(more)
▼ Low
drag bluff road vehicle design can be obtained effectively and efficiently with a three phase approach that uses numerical simulations, scaled wind tunnel experiments and full-scale road testing. By applying this generalised method, SideWings were developed for an improved trailer underbody flow and tails for the trailer's rear-end. A combination of these aerodynamic devices resulted in fuel savings of up to 3 l/100 km. Further improvements could be obtained by an integral vehicle design when the front of the bluff
body is redesigned as well. Although front adjustments of a bluff
body are less effective, they have an influence on the
drag reduction of rear-end devices, which are necessary to aerodynamically improve bluff bodies.
Advisors/Committee Members: Van Tooren, M.J.L..
Subjects/Keywords: transport; bluff body; aerodynamic; heavy duty vehicle; trailer; drag reduction
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Van Raemdonck, G. M. R. (2012). Design of Low Drag Bluff Road Vehicles. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23
Chicago Manual of Style (16th Edition):
Van Raemdonck, G M R. “Design of Low Drag Bluff Road Vehicles.” 2012. Doctoral Dissertation, Delft University of Technology. Accessed January 21, 2021.
http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23.
MLA Handbook (7th Edition):
Van Raemdonck, G M R. “Design of Low Drag Bluff Road Vehicles.” 2012. Web. 21 Jan 2021.
Vancouver:
Van Raemdonck GMR. Design of Low Drag Bluff Road Vehicles. [Internet] [Doctoral dissertation]. Delft University of Technology; 2012. [cited 2021 Jan 21].
Available from: http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23.
Council of Science Editors:
Van Raemdonck GMR. Design of Low Drag Bluff Road Vehicles. [Doctoral Dissertation]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; urn:NBN:nl:ui:24-uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23 ; http://resolver.tudelft.nl/uuid:7f7d98b2-aac4-433b-92b9-a990975c0b23
Brno University of Technology
19.
Krejčiřík, Stanislav.
Možnosti snižování odporu pohybujících se těles v kapalinách inspirované přírodou: Possible ways of reduction of the resistance of a body moving in liquids inspired by nature.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/32887
► The bachelor´s thesis follows up the possible ways of body drag reduction, and it is inspired by nature. In the first part, basic theoretical concepts…
(more)
▼ The bachelor´s thesis follows up the possible ways of
body drag reduction, and it is inspired by nature. In the first part, basic theoretical concepts regarding bodies moving in liquids are described. Furthermore the thesis presents particular marine animals with developed mechanism for
drag reduction. This includes dolphins, sharks and humpback whales. Possible technical and other applications are shown on these examples.
Advisors/Committee Members: Štigler, Jaroslav (advisor), Soukup, Lubomír (referee).
Subjects/Keywords: odpor tělesa; odtržení proudu; viskózní tlumení; ploutev s hrbolky; žraločí kůže; drag of body; flow separation; viscous damping; flipper with tubercles; shark skin
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Krejčiřík, S. (2019). Možnosti snižování odporu pohybujících se těles v kapalinách inspirované přírodou: Possible ways of reduction of the resistance of a body moving in liquids inspired by nature. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/32887
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Krejčiřík, Stanislav. “Možnosti snižování odporu pohybujících se těles v kapalinách inspirované přírodou: Possible ways of reduction of the resistance of a body moving in liquids inspired by nature.” 2019. Thesis, Brno University of Technology. Accessed January 21, 2021.
http://hdl.handle.net/11012/32887.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Krejčiřík, Stanislav. “Možnosti snižování odporu pohybujících se těles v kapalinách inspirované přírodou: Possible ways of reduction of the resistance of a body moving in liquids inspired by nature.” 2019. Web. 21 Jan 2021.
Vancouver:
Krejčiřík S. Možnosti snižování odporu pohybujících se těles v kapalinách inspirované přírodou: Possible ways of reduction of the resistance of a body moving in liquids inspired by nature. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/11012/32887.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Krejčiřík S. Možnosti snižování odporu pohybujících se těles v kapalinách inspirované přírodou: Possible ways of reduction of the resistance of a body moving in liquids inspired by nature. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/32887
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
20.
Kurzawa, Kristin.
Femmes: Front and Center.
Degree: MFA, 2009, University of Michigan
URL: http://hdl.handle.net/2027.42/64059
► Kurzawa, 2 Abstract Femmes Front and Center is a visual and textual inquiry into the dynamics of queer femme performers within the queer community. Visually,…
(more)
▼ Kurzawa, 2
Abstract
Femmes Front and Center is a visual and textual inquiry into the dynamics of queer femme
performers within the queer community. Visually, Femmes: Front and Center brings the viewer
face to face with queer femme performers through large scale, color photographs framed in
classic, exhibition style. The exhibit reveals the intersections of gender identity, queerness,
body
size, race, and dis/ability. Femmes Front and Center, the written work, explores the history of
queer performance culture from gay men and
drag queens to
drag kings to queer femme
drag
queens. It theorizes that queer femme performers and dis/abled queer femmes are disrupting
existing paradigms of
drag performance, gender identity, and
body acceptance.
Advisors/Committee Members: Art and Design, School of (A&D) (affiliationum), Ann Arbor (affiliationumcampus).
Subjects/Keywords: Body Size; Race; Queer Femme Performers; Disability; Gay; Gender Identity; Drag Queens; Drag Kings; Queerness; Drag Performance; Body Acceptance; Photography; Art and Design; Arts
…for one evening?
Did the macho attitude set by the drag king conference encourage the… …will for another hour. But I can only work as long as this
queer femme dis/abled body allows… …me.
@@@
Kurzawa, 8
Frame Two: IDKE X
The International Drag King Extravaganza is a… …exploring
drag king culture. In 2008, the Tenth Annual IDKE was held
in Columbus, Ohio. I became… …photojournalism within the drag culture, was accepted
by IDKE organizers. In addition, I exhibited…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kurzawa, K. (2009). Femmes: Front and Center. (Thesis). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/64059
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kurzawa, Kristin. “Femmes: Front and Center.” 2009. Thesis, University of Michigan. Accessed January 21, 2021.
http://hdl.handle.net/2027.42/64059.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kurzawa, Kristin. “Femmes: Front and Center.” 2009. Web. 21 Jan 2021.
Vancouver:
Kurzawa K. Femmes: Front and Center. [Internet] [Thesis]. University of Michigan; 2009. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/2027.42/64059.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kurzawa K. Femmes: Front and Center. [Thesis]. University of Michigan; 2009. Available from: http://hdl.handle.net/2027.42/64059
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
Beitel, Adam Daniel 1993-.
THE EFFECT OF ASPECT RATIO ON THE AERODYNAMIC FORCES AND FREE END PRESSURE DISTRIBUTION FOR A SURFACE-MOUNTED FINITE HEIGHT CYLINDER.
Degree: 2017, University of Saskatchewan
URL: http://hdl.handle.net/10388/8040
► The surface-mounted finite-height cylinder is a fundamental engineering shape and can be found in a multitude of industrial applications. As a result, the local flow…
(more)
▼ The surface-mounted finite-height cylinder is a fundamental engineering shape and can be found in a multitude of industrial applications. As a result, the local flow field is of great importance in the design of cylindrical components such as heat exchangers or buildings. While two-dimensional (2-D or “infinite”) cylinders are well-understood, the effects of the ground plane and the cylinder free end are significant and require further study. Of particular interest in this thesis is the pressure distribution on the free end of the cylinder, and a mean normal force that develops from it. A vast majority of studies on this topic have focused on short cylinders with a small aspect ratio (AR = height/diameter). The work in this thesis is an attempt to characterize how the pressure distribution and mean aerodynamic forces are influenced by the aspect ratio of the cylinder and the boundary layer thickness of the flow. The little-researched mean normal force, the mean
drag force and its resultant mean bending moment, and the associated vortex shedding in the wake are investigated, along with the mean surface pressures and pressure fluctuations for the cylinder free end. A cylinder was designed for use in measuring these parameters for 22 evenly spaced aspect ratios in a range from 0.5 ≤ AR ≤ 11, and an additional cylinder and boundary layer were used to generate data for four different values of relative boundary layer thickness in the range 0.60 ≤ δ/D ≤ 2.86.
The results of this research fit in well with published data, and reveal that the flow regimes appear to be marked by two critical aspect ratios, located approximately at AR = 2.5 and AR = 6. Below the lower critical AR, the boundary layer and ground plane effects are dominant, and the Strouhal number and the mean
drag and mean normal force coefficients are drastically reduced. The mean bending moment coefficient is high at low AR, possibly owing to the high point of action of the
drag force caused by the velocity distribution in the boundary layer. Between the two critical aspect ratios, the mean force coefficients and Strouhal number are relatively insensitive to AR. Above the upper critical AR, the mean
drag coefficient increases towards the value for a 2-D cylinder, while the mean normal force coefficient reduces, and is expected to approach a small, constant value. A vertical wall shear force that acts in the opposite direction of the free end pressures may account for the difference between the mean normal force results obtained from integration and those obtained from direct measurements. For high AR, the bending moment coefficient and point of action are relatively unchanged. The free end pressure distributions reveal similar features to previously published data, including “eye-like” enclosed regions of minimum pressure on the upstream half of the cylinder face, and an enclosed region of maximum pressure on the downstream half of the cylinder face. The eye-like structures disappear above the upper critical AR, and are replaced with a band of minimum…
Advisors/Committee Members: Sumner, David R, Bugg, James D, Mazurek, Kerry A, Evitts, Richard.
Subjects/Keywords: Fluids; bluff body; cylinder; drag; normal force; pressure distribution; free end
…Aspect ratio, H/D
CD
Mean drag coefficient
Cij
Calibration coefficient
CMy
Mean bending… …x5B;Hz]
FD
Mean drag force [N]
FN
Mean normal force [N]
fs… …a bluff
(non-streamlined) body, associated with a large wake and a region of… …and the boundary layer height,
δ. The oncoming flow creates a mean drag force, FD, a mean… …The denominator of the coefficient is the freestream
dynamic pressure, q∞. The mean drag and…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Beitel, A. D. 1. (2017). THE EFFECT OF ASPECT RATIO ON THE AERODYNAMIC FORCES AND FREE END PRESSURE DISTRIBUTION FOR A SURFACE-MOUNTED FINITE HEIGHT CYLINDER. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/8040
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Beitel, Adam Daniel 1993-. “THE EFFECT OF ASPECT RATIO ON THE AERODYNAMIC FORCES AND FREE END PRESSURE DISTRIBUTION FOR A SURFACE-MOUNTED FINITE HEIGHT CYLINDER.” 2017. Thesis, University of Saskatchewan. Accessed January 21, 2021.
http://hdl.handle.net/10388/8040.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Beitel, Adam Daniel 1993-. “THE EFFECT OF ASPECT RATIO ON THE AERODYNAMIC FORCES AND FREE END PRESSURE DISTRIBUTION FOR A SURFACE-MOUNTED FINITE HEIGHT CYLINDER.” 2017. Web. 21 Jan 2021.
Vancouver:
Beitel AD1. THE EFFECT OF ASPECT RATIO ON THE AERODYNAMIC FORCES AND FREE END PRESSURE DISTRIBUTION FOR A SURFACE-MOUNTED FINITE HEIGHT CYLINDER. [Internet] [Thesis]. University of Saskatchewan; 2017. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/10388/8040.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Beitel AD1. THE EFFECT OF ASPECT RATIO ON THE AERODYNAMIC FORCES AND FREE END PRESSURE DISTRIBUTION FOR A SURFACE-MOUNTED FINITE HEIGHT CYLINDER. [Thesis]. University of Saskatchewan; 2017. Available from: http://hdl.handle.net/10388/8040
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Costa, Ingo Rohacek.
Modelação e concepção da carroçaria do veículo eléctrico ecológico (VEECO).
Degree: 2013, Repositório Científico do Instituto Politécnico de Lisboa
URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/2555
► Neste trabalho aborda-se o desenvolvimento da carroçaria do Veículo Eléctrico Ecológico – VEECO recorrendo a tecnologias assistidas por computador. Devido à impossibilidade de abranger toda…
(more)
▼ Neste trabalho aborda-se o desenvolvimento da carroçaria do Veículo Eléctrico Ecológico –
VEECO recorrendo a tecnologias assistidas por computador. Devido à impossibilidade de abranger toda a temática das tecnologias assistidas por computador, associadas ao desenvolvimento de uma carroçaria automóvel, o foco deste trabalho assenta no processo de obtenção de um modelo digital válido e no estudo do desempenho aerodinâmico da carroçaria.
A existência de um modelo digital válido é a base de qualquer processo de desenvolvimento associado a tecnologias assistidas por computador. Neste sentido, numa primeira etapa, foram aplicadas e desenvolvidas técnicas e metodologias que permitem o desenvolvimento de uma carroçaria desde a sua fase de “design” até à obtenção de um modelo digital CAD. Estas abrangem a conversão e importação de dados, a realização de engenharia inversa, a construção/reconstrução CAD em CATIA V5 e a preparação/correcção de modelos CAD para a análise numérica.
Numa segunda etapa realizou-se o estudo da aerodinâmica exterior da carroçaria, recorrendo à ferramenta de análise computacional de fluidos (CFD) Flow Simulation da CosmosFloworks integrado no programa SolidWorks 2010.
Associado à temática do estudo aerodinâmico e devido à elevada importância da validação dos resultados numéricos por meio de dados experimentais, foi realizado o estudo de análise dimensional que permite a realização de ensaios experimentais à escala, bem como a análise dos resultados experimentais obtidos.
In the present work the development of the body of the Ecological Electric Vehicle – VEECO using computer-assisted technologies is addressed. Due to the impossibility to address the entire subject of computer-assisted technologies, in the development of a road vehicle body, the focus of this work lies in obtaining a valid digital model and in the study of the aerodynamic performance of the body.
The existence of a valid digital model is the starting point for any development process associated with computer-assisted technologies. In this sense, in a first step, techniques and methodologies were applied and developed that enable the development of a body from its design phase until the obtainment of a digital CAD model. These include the conversion and importing of data, reverse engineering, the CAD construction/reconstruction in CATIA V5 and the preparation/correction of CAD models for the numerical analysis.
In a second step, the external aerodynamics study of the body was performed, using the computational fluid dynamics (CFD) tool Flow Simulation from CosmosFloworks integrated in the software SolidWorks 2010.
Associated with the thematic of aerodynamic analysis and the importance of validating the numerical results with experimental data, a dimensional analysis which allows to conduct experimental tests with scale models was performed, as well as the analysis of the obtained experimental results.
Advisors/Committee Members: Simões, José Filipe Castanheira Pereira Antunes, Leite, Afonso Manuel da Costa de Sousa.
Subjects/Keywords: Carroçaria; Modelação 3D automóvel; Engenharia inversa; Análise aerodinâmica; CFD; CFD automóvel; Coeficiente de arrasto; Aerodinâmica automóvel; Car body structures; Automotive 3D modeling; Reverse engineering; Aerodynamic analysis; Car CFD; Drag Coefficient; Road vehicle aerodynamics
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Costa, I. R. (2013). Modelação e concepção da carroçaria do veículo eléctrico ecológico (VEECO). (Thesis). Repositório Científico do Instituto Politécnico de Lisboa. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/2555
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Costa, Ingo Rohacek. “Modelação e concepção da carroçaria do veículo eléctrico ecológico (VEECO).” 2013. Thesis, Repositório Científico do Instituto Politécnico de Lisboa. Accessed January 21, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/2555.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Costa, Ingo Rohacek. “Modelação e concepção da carroçaria do veículo eléctrico ecológico (VEECO).” 2013. Web. 21 Jan 2021.
Vancouver:
Costa IR. Modelação e concepção da carroçaria do veículo eléctrico ecológico (VEECO). [Internet] [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2013. [cited 2021 Jan 21].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/2555.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Costa IR. Modelação e concepção da carroçaria do veículo eléctrico ecológico (VEECO). [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/2555
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
Eulalie, Yoann.
Étude aérodynamique et contrôle de la traînée sur un corps de Ahmed culot droit : Aerodynamic analysis and drag reduction around an Ahmed bluff body.
Degree: Docteur es, Mathématiques appliquées et calcul scientifique, 2014, Bordeaux
URL: http://www.theses.fr/2014BORD0310
► L’objectif de ce travail de thèse consiste à analyser les solutions de contrôle permettant de réduire la traînée aérodynamique et donc de diminuer la consommation…
(more)
▼ L’objectif de ce travail de thèse consiste à analyser les solutions de contrôle permettant de réduire la traînée aérodynamique et donc de diminuer la consommation d’un véhicule. Les véhicules ciblés dans cette étude sont ceux se rapprochant d’une géométrie à culot droit telles que les versions break, monospace, SUV, utilitaires, ou même les remorques de camions. Pour s’affranchir des variantes de style, ces travaux sont concentrés sur la géométrie académique du corps de Ahmed à culot droit. La vitesse de l’écoulement est de 30m/s afin de retrouver des caractéristiques d’un écoulement de sillage fortement turbulent, proche des vitesses d’un véhicule sur autoroute. Ce travail à dominante numérique se décompose en deux parties : la première a pour objectif de valider les résultats de calculs avec et sans solution de contrôle avec des mesures expérimentales identiques, la seconde d’explorer numériquement des configurations de contrôle mixant des solutions de jets périodiques et de déflecteurs agissant sur le sillage du corps de Ahmed à culot droit. Les solutions les plus efficaces apportent des réductions de la traînée de l’ordre de 10%.
This present work is focused on the analysis of control solutions that reduce the aerodynamic drag and therefore the fuel consumption of vehicles. The selected vehicle geometries are closed to a bluff body such as Estate, van, SUV, commercial vehicles or even truck trailers. This work is then focused on the academic geometry of Ahmed body with square back in order to avoid style diversity. The reference velocity flow is equal to 30m/s, which is closed to a vehicle speed on a highway, and induces a highly turbulent wake flow. This work mainly numerical is divided in two parts. The first one is dedicated to the validation of the numerical model with experimental wind tunnel measurements. The second part looks for numerical configurations of flow control solution, mixing periodic jet and deflector both acting on the wake. Most effective solutions lead to drag reduction of about 10%.
Advisors/Committee Members: Mortazavi, Iraj (thesis director).
Subjects/Keywords: Corps de Ahmed; Culot droit; Simulation LES; Contrôle aérodynamique; Réduction de traînée; Aérodynamique externe; Sillage turbulent; Comparaison essais calcul; Ahmed body; Square back; LES computation; Drag reduction; External aerodynamic; Turbulent wake; Comparison numerical experiment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Eulalie, Y. (2014). Étude aérodynamique et contrôle de la traînée sur un corps de Ahmed culot droit : Aerodynamic analysis and drag reduction around an Ahmed bluff body. (Doctoral Dissertation). Bordeaux. Retrieved from http://www.theses.fr/2014BORD0310
Chicago Manual of Style (16th Edition):
Eulalie, Yoann. “Étude aérodynamique et contrôle de la traînée sur un corps de Ahmed culot droit : Aerodynamic analysis and drag reduction around an Ahmed bluff body.” 2014. Doctoral Dissertation, Bordeaux. Accessed January 21, 2021.
http://www.theses.fr/2014BORD0310.
MLA Handbook (7th Edition):
Eulalie, Yoann. “Étude aérodynamique et contrôle de la traînée sur un corps de Ahmed culot droit : Aerodynamic analysis and drag reduction around an Ahmed bluff body.” 2014. Web. 21 Jan 2021.
Vancouver:
Eulalie Y. Étude aérodynamique et contrôle de la traînée sur un corps de Ahmed culot droit : Aerodynamic analysis and drag reduction around an Ahmed bluff body. [Internet] [Doctoral dissertation]. Bordeaux; 2014. [cited 2021 Jan 21].
Available from: http://www.theses.fr/2014BORD0310.
Council of Science Editors:
Eulalie Y. Étude aérodynamique et contrôle de la traînée sur un corps de Ahmed culot droit : Aerodynamic analysis and drag reduction around an Ahmed bluff body. [Doctoral Dissertation]. Bordeaux; 2014. Available from: http://www.theses.fr/2014BORD0310
Loughborough University
24.
Heatlie, Fiona.
Turbulent flow around bluff bodies at the floodplain edge.
Degree: PhD, 2010, Loughborough University
URL: http://hdl.handle.net/2134/8517
► This thesis examines the flow around bluff bodies placed at the floodplain edge in a compound, open channel. The floodplain edge location is associated with…
(more)
▼ This thesis examines the flow around bluff bodies placed at the floodplain edge in a compound, open channel. The floodplain edge location is associated with a strong shear layer between lower velocity floodplain flow and high velocity flow in the main channel. The drag force exerted by a bluff body is dependant on the way in which the flow separates around the body and subsequently recovers but the drag coefficients typically used to represent the effects of bluff bodies are based on experiments on bodies in geometrically simple channels. The differences induced in the wake structures and therefore in the drag coefficients of bluff bodies when they are placed in the shear layer at the floodplain edge are little understood. In this study, experimental data is gathered that allows direct comparison of the wakes of identical bluff bodies, both emergent (surface-piercing) and submerged, in simple and compound open channels. For the compound channel scenarios, for both single and multiple block arrangements, turbulence data is also reported. These results are augmented using a computational model based on the solution of the 3D Reynolds Averaged Navier Stokes equations, using a non-linear turbulence model. The results show that the changes induced in the wake structures due to their location at the floodplain edge of the compound channel can have a significant effect on the drag coefficient. For the emergent bodies, the proximity of the deep main channel flow is shown to impact in a complex manner upon the processes of reattachment and re-separation, changing the formation of vorticity in the wake. For the submerged bodies, this is complicated by asymmetry in the same processes on the block top. For both body types, separation on the main channel side results in the creation of a strong axial circulation at the floodplain edge and the decay of the wake is asymmetrically affected by the differing behaviour of the turbulence on the two sides.
Subjects/Keywords: 620.1064; Compound channel flow; Floodplain vegetation; One line vegetation; Bluff body drag; Surface-piercing cylinder; Surface mounted cylinder
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Heatlie, F. (2010). Turbulent flow around bluff bodies at the floodplain edge. (Doctoral Dissertation). Loughborough University. Retrieved from http://hdl.handle.net/2134/8517
Chicago Manual of Style (16th Edition):
Heatlie, Fiona. “Turbulent flow around bluff bodies at the floodplain edge.” 2010. Doctoral Dissertation, Loughborough University. Accessed January 21, 2021.
http://hdl.handle.net/2134/8517.
MLA Handbook (7th Edition):
Heatlie, Fiona. “Turbulent flow around bluff bodies at the floodplain edge.” 2010. Web. 21 Jan 2021.
Vancouver:
Heatlie F. Turbulent flow around bluff bodies at the floodplain edge. [Internet] [Doctoral dissertation]. Loughborough University; 2010. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/2134/8517.
Council of Science Editors:
Heatlie F. Turbulent flow around bluff bodies at the floodplain edge. [Doctoral Dissertation]. Loughborough University; 2010. Available from: http://hdl.handle.net/2134/8517
25.
Mugnaini, Christopher Michael.
Aerodynamic drag reduction of a tractor trailer using vortex generators: a computational fluid dynamic study.
Degree: MS, Mechanical Engineering, 2015, California State University – Sacramento
URL: http://hdl.handle.net/10211.3/158683
► Recently, with increasing fuel prices and advancing technology, there has been a market for making tractor-trailer trucks more aerodynamically efficient. The tractors are being sold…
(more)
▼ Recently, with increasing fuel prices and advancing technology, there has been a market for making tractor-trailer trucks more aerodynamically efficient. The tractors are being sold with standard aerodynamic packages but there still exists room for improvement by creating aerodynamic add-on devices for the trailer. A device that is already being used in the aeronautical industry to control the flow of air is the vortex generator. There is a potential for this device to be applied to the trailing edge of the trailer in order to decrease the base wake region area and decrease the overall
drag of the truck. Computational fluid dynamics was used in order to analyze the effectiveness of multiple types of vortex generators: wishbone, strake, conventional, delta wing, and aircraft style. SolidWorks was used to model a Peterbilt Model 579 in 3D and ANSYS Fluent was used to simulate the flow situation. The wishbone type and the aircraft type generated the greatest reduction in overall
drag of 1.11% and 1.10% respectively in an educational release of ANSYS, while the aircraft type generated a 4.31% reduction in
drag in a research release
of ANSYS. These results do not compare to the effectiveness of other trailer devices that are currently on the market, but show that vortex generators can be used in order to augment the overall
drag reduction when used with other devices.
Advisors/Committee Members: Zhou, Dongmei.
Subjects/Keywords: Bluff body; Drag coefficient; ANSYS Fluent; DS SolidWorks; Tractor trailer; Vortex generators
…7
1.7 Drag… …9
1.9 Wind Averaged Drag Coefficient… …80
x
LIST OF TABLES
Tables
Page
Table 2.1 - Summary of Drag Reduction from Add-On… …Device [3] ................................. 17
Table 2.2 - Tractor Device Drag and… …33
Table 3.4 - Results of the drag coefficient for various iterations [5]…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mugnaini, C. M. (2015). Aerodynamic drag reduction of a tractor trailer using vortex generators: a computational fluid dynamic study. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.3/158683
Chicago Manual of Style (16th Edition):
Mugnaini, Christopher Michael. “Aerodynamic drag reduction of a tractor trailer using vortex generators: a computational fluid dynamic study.” 2015. Masters Thesis, California State University – Sacramento. Accessed January 21, 2021.
http://hdl.handle.net/10211.3/158683.
MLA Handbook (7th Edition):
Mugnaini, Christopher Michael. “Aerodynamic drag reduction of a tractor trailer using vortex generators: a computational fluid dynamic study.” 2015. Web. 21 Jan 2021.
Vancouver:
Mugnaini CM. Aerodynamic drag reduction of a tractor trailer using vortex generators: a computational fluid dynamic study. [Internet] [Masters thesis]. California State University – Sacramento; 2015. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/10211.3/158683.
Council of Science Editors:
Mugnaini CM. Aerodynamic drag reduction of a tractor trailer using vortex generators: a computational fluid dynamic study. [Masters Thesis]. California State University – Sacramento; 2015. Available from: http://hdl.handle.net/10211.3/158683
Virginia Tech
26.
DeMoss, Joshua Andrew.
Drag Measurements on an Ellipsoidal Body.
Degree: MS, Aerospace and Ocean Engineering, 2007, Virginia Tech
URL: http://hdl.handle.net/10919/34908
► A drag study was conducted on an oblate ellipsoid body in the Virginia Tech Stability Wind Tunnel. Two-dimensional wake surveys were taken with a seven-hole…
(more)
▼ A
drag study was conducted on an oblate ellipsoid
body in the Virginia Tech Stability Wind Tunnel. Two-dimensional wake surveys were taken with a seven-hole probe and an integral momentum method was applied to the results to calculate the
drag on the
body. Several different model configurations were tested; these included the model oriented at a 0° and 10° angle of attack with respect to the oncoming flow. For both angles, the model was tested with and without flow trip strips. At the 0° angle of attack orientation, data were taken at a speed of 44 m/s. Data with the model at a 10° angle of attack were taken at 44 m/s and 16 m/s. The high speed flow corresponded to a length-based Reynolds number of about 4.3 million; the low speed flow gave a Reynolds number of about 1.6 million. The results indicated that the length-squared
drag coefficients ranged from around 0.0026 for the 0° angle of attack test cases and 0.0035 for the 10° angle of attack test cases. The 10° angle of attack cases had higher
drag due to the increase in the frontal profile area of the model and the addition of induced
drag. The flow trip strips appeared to have a tiny effect on the
drag; a slight increase in
drag coefficient was seen by their application but it was not outside of the uncertainty in the calculation. At the lower speed, uncertainties in the calculation were so high that the
drag results could not be considered with much confidence, but the
drag coefficient did decrease from the higher Reynolds number cases. Uncertainty in the
drag calculations derived primarily from spatial fluctuations of the mean velocity and total pressure in the wake profile; uncertainty was estimated to be about 16% or less for the 44 m/s test cases.
Advisors/Committee Members: Simpson, Roger L. (committeechair), Devenport, William J. (committee member), Neu, Wayne L. (committee member).
Subjects/Keywords: Wake Measurement; Drag Measurement; Ellipsoid; Non-body of Revolution; Seven-hole probe; Multi-hole probe; Subsonic Aerodynamics
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
DeMoss, J. A. (2007). Drag Measurements on an Ellipsoidal Body. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/34908
Chicago Manual of Style (16th Edition):
DeMoss, Joshua Andrew. “Drag Measurements on an Ellipsoidal Body.” 2007. Masters Thesis, Virginia Tech. Accessed January 21, 2021.
http://hdl.handle.net/10919/34908.
MLA Handbook (7th Edition):
DeMoss, Joshua Andrew. “Drag Measurements on an Ellipsoidal Body.” 2007. Web. 21 Jan 2021.
Vancouver:
DeMoss JA. Drag Measurements on an Ellipsoidal Body. [Internet] [Masters thesis]. Virginia Tech; 2007. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/10919/34908.
Council of Science Editors:
DeMoss JA. Drag Measurements on an Ellipsoidal Body. [Masters Thesis]. Virginia Tech; 2007. Available from: http://hdl.handle.net/10919/34908
27.
Whiteman, Jacob T.
Active Flow Control Schemes for Bluff Body Drag
Reduction.
Degree: MS, Aero/Astro Engineering, 2016, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1452184221
► Bluff body vehicle drag is dominated by pressure drag on the rear end of the body due to the effect of momentum causing the flow…
(more)
▼ Bluff
body vehicle
drag is dominated by pressure
drag
on the rear end of the
body due to the effect of momentum causing
the flow to detach from the
body contour. This flow separation
results in a pressure difference between the front and back end,
making up the pressure
drag. A friction force is also generated at
the contact of air and solid
body that contributes to the total
drag, however in the case of bluff
body flow this value is far
outweighed by the pressure
drag. The rear separation region is also
dominated by complex time dependent vortices, of which this
pressure
drag is also dependent, thereby making the overall
drag at
least partially dependent on the strength and frequency of this
shedding phenomena as well. In this study, both a two-dimensional
and three-dimensional Ahmed model are used, however only the
zero-slant angle case is studied to coincide with the majority of
transportation trucks and buses that are on the road
today.Numerical simulation experiments on vortex shedding and
corresponding
drag coefficients from a two-dimensional bluff
body
are performed over a range of Reynolds numbers from one to four
million. The simulations are performed using ANSYS Fluent,
specifically the turbulence model of k-epsilon RNG
(Re-normalization Group). In order to enhance the accuracy of the
shedding wake vortices, an enhanced non-equilibrium wall treatment
is utilized. Active control is implemented on the
body via velocity
boundary conditions in the form of blowing and suction jets. These
controls range in velocity from half to double the free-stream
inlet velocity. An overall
drag coefficient reduction in excess of
75% is observed for maximum power input to the actuators. In
addition, a trend of increasing Strouhal number for each successive
increase in actuator power (and corresponding reduction in
drag) is
noted. Important physical mechanisms involving near-
body wake flow
are analyzed to determine optimal wake flow pattern and
corresponding control schemes.Discoveries are then used to study
similar controls on the three-dimensional bluff
body based on those
of the two-dimensional model. For the 3-D simulations the Large
Eddy Simulation model is used for the calculation of flow field
variables within Fluent, however an introductory RANS analysis is
performed as well. Control schemes involving suction jets are
investigated. Aspects of the flow pattern such as shedding and
streamlines are studied in depth in an effort to determine the most
efficient application of the suction controls. These schemes seek
to reduce the aerodynamic
drag without constraints on the basic
design of the model itself. An average of 10%
drag reduction is
recorded.
Advisors/Committee Members: Zhuang, Mei (Advisor).
Subjects/Keywords: Aerospace Engineering; Engineering; bluff body; ahmed; drag reduction; active control; LES; RANS; Fluent; ICEM
…3.3
. . . . . .
. . . . . .
. . . . . .
and Drag
. . . . . .
. . . . . .
31
40
Three… …back Ahmed body (absence
of St entry indicates shedding stoppage)… …32
Data from blowing simulations on square-back Ahmed body (absence
of St entry… …domain dimensions . . .
19
3.2
Near-body structured mesh of computational domain… …Transient drag comparison between the two different methods . . . .
24
3.6
(Upper)…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Whiteman, J. T. (2016). Active Flow Control Schemes for Bluff Body Drag
Reduction. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1452184221
Chicago Manual of Style (16th Edition):
Whiteman, Jacob T. “Active Flow Control Schemes for Bluff Body Drag
Reduction.” 2016. Masters Thesis, The Ohio State University. Accessed January 21, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1452184221.
MLA Handbook (7th Edition):
Whiteman, Jacob T. “Active Flow Control Schemes for Bluff Body Drag
Reduction.” 2016. Web. 21 Jan 2021.
Vancouver:
Whiteman JT. Active Flow Control Schemes for Bluff Body Drag
Reduction. [Internet] [Masters thesis]. The Ohio State University; 2016. [cited 2021 Jan 21].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1452184221.
Council of Science Editors:
Whiteman JT. Active Flow Control Schemes for Bluff Body Drag
Reduction. [Masters Thesis]. The Ohio State University; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1452184221
28.
Ogunremi, Ayodele.
The Effect of a Wake-Mounted Splitter Plate on the Flow around a Surface-Mounted Finite-Height Square Prism.
Degree: 2014, University of Saskatchewan
URL: http://hdl.handle.net/10388/ETD-2014-06-1567
► The flow around a finite square prism has not been studied extensively when compared with an “infinite” (or two-dimensional) square prism. In the present study,…
(more)
▼ The flow around a finite square prism has not been studied extensively when compared with an “infinite” (or two-dimensional) square prism. In the present study, the effect of a wake-mounted splitter plate on the flow around a surface-mounted square prism of finite height was investigated experimentally using a low-speed wind tunnel. Of specific interest were the combined effects of the splitter plate length and the prism’s aspect ratio on the vortex shedding, mean
drag force coefficient, and the mean wake. Four square prisms of aspect ratios AR = 9, 7, 5 and 3 were tested at a Reynolds number of Re = 7.4×104 and a boundary layer thickness of /D = 1.5. Splitter plate lengths of L/D = 1, 1.5, 2, 3, 5, and 7, were tested, with all plates having the same height as the prism. Measurements of the mean
drag force were obtained with a force balance, and measurements of the vortex shedding frequency were obtained with a single-component hot-wire probe. A seven-hole pressure probe was used to measure the time-averaged wake velocity at a Reynolds number of Re = 3.7×104 for AR = 9 and 5 with splitter plates of lengths L/D = 1, 3, 5, and 7. These measurements were carried out to allow for a better understanding of how the splitter plate affects the mean wake of the finite prism.
The results show that the splitter plate is a less effective
drag-reduction, but more effective vortex-shedding-suppression, device for finite square prisms than it is for infinite square prisms. Significant reduction in the mean
drag coefficient was realized only for short prisms (of AR ≤ 5) when long splitter plates (of L/D ≥ 5) were used. A splitter plate of length L/D = 3 was able to suppress vortex shedding for all aspect ratios tested. However, for square prisms of aspect ratios AR ≤ 7, the splitter plate is a less effective vortex-shedding-suppression device when compared to its use with finite circular cylinders, i.e. longer splitter plates are needed for vortex shedding suppression with square prisms. Wake measurements showed distinct wake velocity fields for the two prisms tested. For the prism of AR = 9, a strong downwash flow in the upper part of the wake became weaker towards the ground plane. For the prism of AR = 5, the downwash remained strong close to the ground plane. With splitter plates installed, the downwash became weaker for both prisms. The splitter plate was found to narrow the wake width, especially close to the ground plane, and led to the stretching of the streamwise vortex structures in the vertical direction, and increased entrainment towards the wake centreline in the cross-stream direction.
Advisors/Committee Members: Sumner, David, Bergstrom, Don J., Bugg, Jim D..
Subjects/Keywords: Finite square prism; Bluff body; Drag coefficient; Drag reduction; Vortex shedding; Strouhal number; Splitter plate; Flow control; Wake; Seven-hole probe.
…b) side view.
2
When a body moves through a fluid, it experiences a drag force… …x28;2000),
frictional drag comes from friction between the surface of the body and the… …of the body.
Unlike the frictional drag, pressure drag is linked to wake formation and is… …reduce drag through adding or removing
momentum or energy. Passive bluff body flow control… …CHAPTER FOUR: RESULTS AND DISCUSSION – DRAG COEFFICIENT AND
VORTEX SHEDDING…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ogunremi, A. (2014). The Effect of a Wake-Mounted Splitter Plate on the Flow around a Surface-Mounted Finite-Height Square Prism. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/ETD-2014-06-1567
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ogunremi, Ayodele. “The Effect of a Wake-Mounted Splitter Plate on the Flow around a Surface-Mounted Finite-Height Square Prism.” 2014. Thesis, University of Saskatchewan. Accessed January 21, 2021.
http://hdl.handle.net/10388/ETD-2014-06-1567.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ogunremi, Ayodele. “The Effect of a Wake-Mounted Splitter Plate on the Flow around a Surface-Mounted Finite-Height Square Prism.” 2014. Web. 21 Jan 2021.
Vancouver:
Ogunremi A. The Effect of a Wake-Mounted Splitter Plate on the Flow around a Surface-Mounted Finite-Height Square Prism. [Internet] [Thesis]. University of Saskatchewan; 2014. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/10388/ETD-2014-06-1567.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ogunremi A. The Effect of a Wake-Mounted Splitter Plate on the Flow around a Surface-Mounted Finite-Height Square Prism. [Thesis]. University of Saskatchewan; 2014. Available from: http://hdl.handle.net/10388/ETD-2014-06-1567
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Gothenburg / Göteborgs Universitet
29.
Lord, Hans.
Morphological antipredator adaptations in water fleas.
Degree: 2009, University of Gothenburg / Göteborgs Universitet
URL: http://hdl.handle.net/2077/21030
► Some Bosmina and Daphnia species have the ability to develop extreme morphological antipredator defences, such as long antennules, high carapaces and helmets. The relative sizes…
(more)
▼ Some Bosmina and Daphnia species have the ability to develop extreme morphological antipredator defences, such as long antennules, high carapaces and helmets. The relative sizes of these plastic traits may differ substantially between populations, and also between individuals within a population, between sexes and during ontogeny. In this thesis I examine how abiotic factors (trophic levels and temperature) and biotic factors (fish and invertebrate predators) affect the size and shape of these traits.
In the first two studies, calculations based on experimental results using physical morphological models sinking in glycerine, were used to estimate body drag and energy consumption in Bosmina. Eubosmina longispina, with a low carapace and short antennules, and Eubosmina coregoni gibbera, with a very high carapace and long antennules, were examined. At 5○C, E. c. gibbera had 32-45 % higher body drag than E. longispina. At 20○C the difference was 20-45 %. A model of swimming predicted that, all else being equal, this difference should result in 18-20 % (at 5○C) or 14-16 % (at 20○C) lower swimming speed for E. c. gibbera than for E. longispina. This indicates substantial hydrodynamic costs of the morphological antipredator defences, particularly in low temperatures.
The morphological antipredator defences in E. c. gibbera are larger and more variable in females than in males. Male models had lower body drag than models of asexual and sexual females, suggesting that males can swim 14-28 % faster with the same energy consumption. High speed video documentation of swimming E. c. gibbera showed that males advanced 55-73 % further than females in each swimming stroke. Hydrodynamic body drag may therefore have significant implications for swimming and evolution of sexual dimorphism in water fleas. Males may lack the defensive, but hydrodynamically expensive, high carapace of female E. c. gibbera probably because competition over mates favours low body drag.
The morphology and size of heads and trunks in Daphnia cristata individuals were studied in twenty lakes in the same drainage basin. The lakes showed a variation in lake total phosphorus and in densities of invertebrate predators and fish. In the end of the summer
D. cristata had varying shape and size of their heads. Our results indicate that D. cristata, in nutrient rich lakes, show adaptive morphological defences against both visually hunting and size limited predators.
Female D. cristata head shape, in the examined lakes, varied from small and rounded to large and curved. A significant positive correlation between lake total phosphorus and the allometric head coefficients was found, suggesting that the most extremely shaped heads are found in nutrient-rich lakes.
Subjects/Keywords: Body drag; Daphnia cristata; Reynolds number; viscosity; zooplankton; Bosmina; swimming velocity; cyclomorphosis; sexual dimorphism; head area; helmet angle; trophic condition; allometry; invertebrate predator; fish
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lord, H. (2009). Morphological antipredator adaptations in water fleas. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/21030
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lord, Hans. “Morphological antipredator adaptations in water fleas.” 2009. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed January 21, 2021.
http://hdl.handle.net/2077/21030.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lord, Hans. “Morphological antipredator adaptations in water fleas.” 2009. Web. 21 Jan 2021.
Vancouver:
Lord H. Morphological antipredator adaptations in water fleas. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2009. [cited 2021 Jan 21].
Available from: http://hdl.handle.net/2077/21030.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lord H. Morphological antipredator adaptations in water fleas. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2009. Available from: http://hdl.handle.net/2077/21030
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Southern California
30.
Ghaemi Oskouei, Babak.
Stability of body-vortex systems: Application to aquatic
locomotion.
Degree: PhD, Aerospace & Mechanical Engineering (Dynamics &
Control), 2013, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/451808/rec/6029
► Mathematical modeling and analysis of biological systems such as swimming and flying is an interdisciplinary research field with an extensive range of applications including the…
(more)
▼ Mathematical modeling and analysis of biological
systems such as swimming and flying is an interdisciplinary
research field with an extensive range of applications including
the design of unmanned underwater robots and swarm of robots that
swim together in a coordinated way similar to schooling fish. One
of the main objectives of our work is to develop mathematical
models for certain aspect of schooling. In particular, we examine
(1) the interaction of a single fish with ambient vorticity
possibly generated by other neighboring fish; and (2) the
interaction of multiple fish wakes in large fish schools.; For the
first part, we propose a reduced model of a rigid
body interacting
with point vortices in potential fluid and demonstrate that the
rigid
body can swim upstream in the direction opposite to the
motion of point vortices at no energy cost. Indeed, the rigid
body
itself does not generate any force and its motion is due entirely
to the energy exploited from the presence of the point vortices. We
comment on the stability of these motions and propose
under-actuated active control methods to achieve locomotion in
unsteady wakes.; In the second part, we consider the interaction of
multiple reverse von K´arm´an vortex streets as a model of the
mid-wake region of large fish schools. We focus on the wake
dynamics to gain insight into the role of the fluid in transporting
oxygen and nutrients to inner fish as well as its role in
facilitating or acting as flow barriers to passive locomotion.; We
examine the topology of the streamline patterns in a frame moving
with the same translational velocity as the streets which lends
insight into fluid transport through the mid-wake
region.
Advisors/Committee Members: Kanso, Eva (Committee Chair), Newton, Paul K. (Committee Member), Redekopp, Larry G. (Committee Member), Mitra, Urbashi (Committee Member).
Subjects/Keywords: point vortex; dynamical systems; stability analysis; vortex wake; fish; fish schooling; solid body; fluid; interaction; floquet theory; inviscid; incompressible; irrotational flow; 2D flow; ellipse; circle; Kirchhoff Routh; classical; Milne Thomson; circle theorem; complex potential; velocity; kinematics; submerged; Grobli; periodic; thrust; drag; von Karman; street; mid wake; streamline; pattern; topology; time scale; bifurcation; Doubly-Infinite Array; zeta function; vortex lattice; orientation control; elongated body; staggered street; symmetric street; convergence; integral test; dynamics; control; ideal fluid; aquatic locomotion; propulsion
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ghaemi Oskouei, B. (2013). Stability of body-vortex systems: Application to aquatic
locomotion. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/451808/rec/6029
Chicago Manual of Style (16th Edition):
Ghaemi Oskouei, Babak. “Stability of body-vortex systems: Application to aquatic
locomotion.” 2013. Doctoral Dissertation, University of Southern California. Accessed January 21, 2021.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/451808/rec/6029.
MLA Handbook (7th Edition):
Ghaemi Oskouei, Babak. “Stability of body-vortex systems: Application to aquatic
locomotion.” 2013. Web. 21 Jan 2021.
Vancouver:
Ghaemi Oskouei B. Stability of body-vortex systems: Application to aquatic
locomotion. [Internet] [Doctoral dissertation]. University of Southern California; 2013. [cited 2021 Jan 21].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/451808/rec/6029.
Council of Science Editors:
Ghaemi Oskouei B. Stability of body-vortex systems: Application to aquatic
locomotion. [Doctoral Dissertation]. University of Southern California; 2013. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/451808/rec/6029
◁ [1] [2] ▶
. 
Open Access Theses and Dissertations
