subject:(Computational Fluid Dynamics CFD )

California State University – Sacramento

1. Adem, Feysal Ahmed. Drag reduction of pickup truck using add-on devices.

Degree: MS, Mechanical Engineering, 2010, California State University – Sacramento

► Nowadays the reduction of drag is becoming a very important challenge for all the car manufacturers as they are competing intensely to produce powerful pickup… (more)

▼ Nowadays the reduction of drag is becoming a very important challenge for all the car manufacturers as they are competing intensely to produce powerful pickup trucks with better gas mileage in the market regulated with law reinforcement on fuel emissions and consumers??? need for bigger size trucks with more horse power and cargo capacity. Lower drag provides better performances such as higher top speed and better stability. It also often lowers aerodynamic noise and greenhouse gas emission above all decreases in fuel consumption. However, modern designs of pickup trucks tend to go higher and wider and thus they have higher frontal areas due to the functional, economic and aesthetic requirements. Increasing frontal area of the vehicle tend to increase the drag force acting on the vehicle which is proportional to the dimensionless drag coefficient C_D and the projected area of the vehicle. Consequently, to hold or even decrease the drag on a truck that has a larger frontal area, tremendous effort has to be made. The purpose of this research is to design various aerodynamic add-on devices that can be attached to the pickup truck and reduce aerodynamic drag of the vehicle without comprising on its main design features. The research approach is using computational fluid dynamics (CFD) technique. This thesis focuses on investigating the effects of add-on devises such as Tonneau cover, Rear Roof Garnish, Tail plates, Airdam, Traditional canopy, and Aerocap with 5 different rear inclination angles. After the effect of these add-on devise was quantified, Aerocap with rear inclination angle of 12???, was identified as the one that had the maximum drag reduction and it was further modified to increase the drag reduction by using the 3D curved Aerocap. The effect that drag reduction had on the fuel economy of the truck was also analyzed. Results from numerical simulations and analyses indicated that the 3D curved Aerocap, modified from the Aerocap with inclination angle ??= 12??, had successfully reduced the rear width than the original one. As a result, it had reduced the drag coefficient C_D by about 19.84%. It also reduced the lift coefficient C_(L ) by about 40.72%. At last the impact of 3D curved Aerocap on the fuel economy of the pickup truck was analyzed over the U.S. EPA driving schedules and conclusions were drawn. Advisors/Committee Members: Zhou, Dongmei.

Subjects/Keywords: CFD; Computational fluid dynamics

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APA (6^th Edition):

Adem, F. A. (2010). Drag reduction of pickup truck using add-on devices. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.9/169

Chicago Manual of Style (16^th Edition):

Adem, Feysal Ahmed. “Drag reduction of pickup truck using add-on devices.” 2010. Masters Thesis, California State University – Sacramento. Accessed February 22, 2020. http://hdl.handle.net/10211.9/169.

MLA Handbook (7^th Edition):

Adem, Feysal Ahmed. “Drag reduction of pickup truck using add-on devices.” 2010. Web. 22 Feb 2020.

Vancouver:

Adem FA. Drag reduction of pickup truck using add-on devices. [Internet] [Masters thesis]. California State University – Sacramento; 2010. [cited 2020 Feb 22]. Available from: http://hdl.handle.net/10211.9/169.

Council of Science Editors:

Adem FA. Drag reduction of pickup truck using add-on devices. [Masters Thesis]. California State University – Sacramento; 2010. Available from: http://hdl.handle.net/10211.9/169

Halmstad University

2. Ivchenko, Alexander. Incorporation of OpenFOAM software into Computational Fluid Dynamics process in Volvo Technology.

Degree: Computer and Electrical Engineering (IDE), 2011, Halmstad University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16356

► In this thesis work the feasibility of using open source OpenFOAM software as a solver part for Computation Fluid Dynamics in Volvo Technology is… (more)

Subjects/Keywords: OpenFOAM; CFD; Computational Fluid Dynamics

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APA (6^th Edition):

Ivchenko, A. (2011). Incorporation of OpenFOAM software into Computational Fluid Dynamics process in Volvo Technology. (Thesis). Halmstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16356

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ivchenko, Alexander. “Incorporation of OpenFOAM software into Computational Fluid Dynamics process in Volvo Technology.” 2011. Thesis, Halmstad University. Accessed February 22, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16356.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ivchenko, Alexander. “Incorporation of OpenFOAM software into Computational Fluid Dynamics process in Volvo Technology.” 2011. Web. 22 Feb 2020.

Vancouver:

Ivchenko A. Incorporation of OpenFOAM software into Computational Fluid Dynamics process in Volvo Technology. [Internet] [Thesis]. Halmstad University; 2011. [cited 2020 Feb 22]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16356.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ivchenko A. Incorporation of OpenFOAM software into Computational Fluid Dynamics process in Volvo Technology. [Thesis]. Halmstad University; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16356

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Victoria University of Wellington

3. Willis, Riley. Validation of CFD Predictions of Urban Wind - Developing a Methodology.

Degree: 2017, Victoria University of Wellington

URL: http://hdl.handle.net/10063/7086

► “Good mental health in a fluid or CFD modeller is always indicated by the presence of a suspicious nature, cynicism and a ‘show me’ attitude.… (more)

▼ “Good mental health in a fluid or CFD modeller is always indicated by the presence of a suspicious nature, cynicism and a ‘show me’ attitude. These are not necessarily the best traits for a life mate or a best friend, but they are essential if the integrity of the modelling process is to be maintained.” (Meroney, 2004) Over the past 50 years, Computational Fluid Dynamics (CFD) computer simulation programs have offered a new method of calculating the wind comfort and safety data for use in pedestrian wind studies. CFD models claim to have some important advantages over wind tunnels; which remain the most common method of wind calculation. While wind tunnels provide measurements of selected points, CFD simulations provide whole-flow field data for the entire area under investigation (Blocken, 2014; Blocken, Stathopoulos, & van Beeck, 2016). Similarly, wind tunnel measurements must consider the similarity requirements involved with testing a model at small scale, while CFD simulations can avoid this as they are conducted at full scale (Ramponi & Blocken, 2012a). However, CFD simulations can also often be misleading; and they should only be trusted once they can be proven to be accurate. To appease the requirements for this cynical view- referenced in the above quote- proper verification and validation of a model is imperative. This thesis investigated and tested the current best practice guidelines around CFD model validation, using existing wind tunnel measurements of generic urban arrays. The goal of the research was to determine whether the existing data and guidance around the validation process was sufficient for a consultant user to trust that a CFD model they created was sufficiently accurate to base design decisions from. The CFD code Autodesk CFD was used to simulate two configurations first tested as wind tunnel models by the Architectural Institute of Japan, and Opus labs in Wellington. The Wellington City Council wind speed criteria were used to determine whether the CFD simulations met the required accuracy criteria for council consent. Results from the study found that the CFD models could not meet the accuracy criteria. It concluded that while the validation process provided sufficient guidance, there is a lack of available data which is relevant to CFD validation for urban flows. It was recommended that at least one improved dataset was required, to build a system by which a consultant can identify what the requirements of a CFD model are to provide accurate CFD analysis of the site under investigation. To accommodate the range of sites likely to be present in urban wind studies, it was recommended that the new dataset provided data for a variety of wind flows likely to be found in cities. Advisors/Committee Members: Donn, Michael, Isaacs, Nigel.

Subjects/Keywords: CFD; Validation; Pedestrian wind; Computational Fluid Dynamics

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APA (6^th Edition):

Willis, R. (2017). Validation of CFD Predictions of Urban Wind - Developing a Methodology. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/7086

Chicago Manual of Style (16^th Edition):

Willis, Riley. “Validation of CFD Predictions of Urban Wind - Developing a Methodology.” 2017. Masters Thesis, Victoria University of Wellington. Accessed February 22, 2020. http://hdl.handle.net/10063/7086.

MLA Handbook (7^th Edition):

Willis, Riley. “Validation of CFD Predictions of Urban Wind - Developing a Methodology.” 2017. Web. 22 Feb 2020.

Vancouver:

Willis R. Validation of CFD Predictions of Urban Wind - Developing a Methodology. [Internet] [Masters thesis]. Victoria University of Wellington; 2017. [cited 2020 Feb 22]. Available from: http://hdl.handle.net/10063/7086.

Council of Science Editors:

Willis R. Validation of CFD Predictions of Urban Wind - Developing a Methodology. [Masters Thesis]. Victoria University of Wellington; 2017. Available from: http://hdl.handle.net/10063/7086

University of Edinburgh

4. Machtsiras, Georgios. Utilizing flow characteristics to increase performance in swimming.

Degree: 2013, University of Edinburgh

URL: http://hdl.handle.net/1842/7926

► Performance when gliding in the streamlined position depends on a swimmer’s morphological characteristics, body orientation and water characteristics. The purpose of this thesis was twofold.… (more)

▼ Performance when gliding in the streamlined position depends on a swimmer’s morphological characteristics, body orientation and water characteristics. The purpose of this thesis was twofold. First to identify and assess the effect of controllable factors that contribute to glide performance and second to form the foundations of an improved approach of simulating the fluid flow around the swimmers’ body. To address the purposes of the thesis four investigations were conducted. Study 1. The effect of the head position on glide performance was investigated. When the high, medium and low head positions were compared, it was found that swimmers experience significantly greater resistance and decelerate faster when they adopt a high head position. It was also found that there is no significant difference between the medium and low head position indicating for the first time that swimmers can choose any of the positions according to their natural tendency. Study 2. The second study examined the effect of gliding depth on gliding performance. A range of depths was investigated ranging from 0.8 m to 0.2 m from the water surface. The results demonstrated significantly higher glide factor values for glides at a greater depth when compared to glides closer to the water surface highlighting the retarding effect of wave drag when gliding close to the surface. The optimum gliding performance was reported for glides at 0.8 m from the surface. Study 3. The third study investigated the effect of full body swimsuits on glide performance. According to the findings, it is demonstrated for the first time that the improved gliding performance when wearing full body swimsuits is linked to changes in swimmers’ morphology due to compression. Study 4. In the fourth study the magnitude of resistive forces applied on a swimmer’s body when gliding underwater was assessed with the use of computational fluid dynamics (CFD) and the LES approach. The results showed a close match between the glide factor values of the experimental and the computational findings demonstrating the effectiveness of the CFD method when the LES approach is employed.

Subjects/Keywords: swimming performance; drag; computational fluid dynamics; CFD

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APA (6^th Edition):

Machtsiras, G. (2013). Utilizing flow characteristics to increase performance in swimming. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/7926

Chicago Manual of Style (16^th Edition):

Machtsiras, Georgios. “Utilizing flow characteristics to increase performance in swimming.” 2013. Doctoral Dissertation, University of Edinburgh. Accessed February 22, 2020. http://hdl.handle.net/1842/7926.

MLA Handbook (7^th Edition):

Machtsiras, Georgios. “Utilizing flow characteristics to increase performance in swimming.” 2013. Web. 22 Feb 2020.

Vancouver:

Machtsiras G. Utilizing flow characteristics to increase performance in swimming. [Internet] [Doctoral dissertation]. University of Edinburgh; 2013. [cited 2020 Feb 22]. Available from: http://hdl.handle.net/1842/7926.

Council of Science Editors:

Machtsiras G. Utilizing flow characteristics to increase performance in swimming. [Doctoral Dissertation]. University of Edinburgh; 2013. Available from: http://hdl.handle.net/1842/7926

Penn State University

5. Coder, James George. Development of a CFD-Compatible Transition Model Based on Linear Stability Theory.

Degree: PhD, Aerospace Engineering, 2014, Penn State University

URL: https://etda.libraries.psu.edu/catalog/22627

► A new laminar-turbulent transition model for low-turbulence external aerodynamic applications is presented that incorporates linear stability theory in a manner compatible with modern computational fluid… (more)

Subjects/Keywords: Aerodynamics; computational fluid dynamics; CFD; transition; turbulence

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APA (6^th Edition):

Coder, J. G. (2014). Development of a CFD-Compatible Transition Model Based on Linear Stability Theory. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/22627

Chicago Manual of Style (16^th Edition):

Coder, James George. “Development of a CFD-Compatible Transition Model Based on Linear Stability Theory.” 2014. Doctoral Dissertation, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/22627.

MLA Handbook (7^th Edition):

Coder, James George. “Development of a CFD-Compatible Transition Model Based on Linear Stability Theory.” 2014. Web. 22 Feb 2020.

Vancouver:

Coder JG. Development of a CFD-Compatible Transition Model Based on Linear Stability Theory. [Internet] [Doctoral dissertation]. Penn State University; 2014. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/22627.

Council of Science Editors:

Coder JG. Development of a CFD-Compatible Transition Model Based on Linear Stability Theory. [Doctoral Dissertation]. Penn State University; 2014. Available from: https://etda.libraries.psu.edu/catalog/22627

Delft University of Technology

6. Saleh, K. The Development of Downhole Separators in Series, Using Design Models Based on Computational Fluid Dynamics Verified By Laboratory Experiments:.

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:fe21dbbe-56ae-40a8-a486-0490dcce9136

► One of the major problems associated with oil and gas production is the large volume of produced water. Operators around the world are facing significant… (more)

▼ One of the major problems associated with oil and gas production is the large volume of produced water. Operators around the world are facing significant costs with the treatment and disposal of produced water. Downhole separation, a relatively new technique, has been developed to reduce the costs of produced water and increase oil production. Downhole separation is the technique where oil and gas from the produced wa- ter is separated at the bottom of the well and re-inject some of the produced water into another formation, while the oil and gas are pumped to the surface. The reduction in cost is owed to the downhole treatment of the produced water since most of the topside produced water treatment facilities are reduced in number. Since most of the produced water does not reach the surface this creates an added value of minimizing the opportunity for contamination of underground sources of drinking water through leaks in casing and tubing during the injection process. The goal of this project was to design a downhole liquid-liquid separator and to evaluate the performance at downhole conditions with the aid of computational fluid dynamics. The separation performance is evaluated experimentally. A dedicated test rig has been designed and built at ProLabNL, a sister company of Ascom Separation, to test the separation efficiency of the downhole separator. The designed system consisted of three hydrocyclone stages in series to polish the water to the desired injectate quality of 100 ppm oil in water, and was operated under downhole conditions, i.e. high temperature (70 - 80 àC), high watercut (90 - 95%) and relatively large oil droplets (ranging from 500 - 1000 [μm]) dispersed in the continuous phase. The system design and the operational method are fully outlined. At the tail-end of production, reservoir pressure is depleted causing increased sand production. In the existing commercial downhole separators, the solids that are produced are re-injected downhole leading to potential plugging of the disposal zone. The proposed downhole fluid separation system is equipped with a de-sander to flush the separated sand with the oil rich stream to the surface. Computational fluid dynamics was used to evaluate the pressure balance and volume flux balance of the internals. An erosion analysis was conducted to investigate the wear due to the sand influx. Furthermore, laboratory tests were conducted to evaluate the influence of a progressive cavity pump (PCP) on the shearing effect of an oil water mixture. The pressure-drop over the pump seems to play a cru- cial role on the amount of droplet breakup which leads to a decrease in separation efficiency of the downhole separator. Advisors/Committee Members: Zitha, P.L.J., Swanborn, R.A., Bos, A..

Subjects/Keywords: DOWS; downhole separator; CFD; computational fluid dynamics

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APA (6^th Edition):

Saleh, K. (2015). The Development of Downhole Separators in Series, Using Design Models Based on Computational Fluid Dynamics Verified By Laboratory Experiments:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:fe21dbbe-56ae-40a8-a486-0490dcce9136

Chicago Manual of Style (16^th Edition):

Saleh, K. “The Development of Downhole Separators in Series, Using Design Models Based on Computational Fluid Dynamics Verified By Laboratory Experiments:.” 2015. Masters Thesis, Delft University of Technology. Accessed February 22, 2020. http://resolver.tudelft.nl/uuid:fe21dbbe-56ae-40a8-a486-0490dcce9136.

MLA Handbook (7^th Edition):

Saleh, K. “The Development of Downhole Separators in Series, Using Design Models Based on Computational Fluid Dynamics Verified By Laboratory Experiments:.” 2015. Web. 22 Feb 2020.

Vancouver:

Saleh K. The Development of Downhole Separators in Series, Using Design Models Based on Computational Fluid Dynamics Verified By Laboratory Experiments:. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2020 Feb 22]. Available from: http://resolver.tudelft.nl/uuid:fe21dbbe-56ae-40a8-a486-0490dcce9136.

Council of Science Editors:

Saleh K. The Development of Downhole Separators in Series, Using Design Models Based on Computational Fluid Dynamics Verified By Laboratory Experiments:. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:fe21dbbe-56ae-40a8-a486-0490dcce9136

University of Windsor

7. Vaselbehagh, Ahmadreza. Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant.

Degree: PhD, Mechanical, Automotive, and Materials Engineering, 2015, University of Windsor

URL: https://scholar.uwindsor.ca/etd/5493

► The present document is a manuscript-based dissertation covering Ahmadreza Vasel-Be-Hagh's PhD research from September, 2011 to May, 2015. The research was particularly focused on… (more)

▼ The present document is a manuscript-based dissertation covering Ahmadreza Vasel-Be-Hagh's PhD research from September, 2011 to May, 2015. The research was particularly focused on studying hydrodynamics of underwater accumulators of compressed air for an underwater compressed air energy storage (UWCAES) plant. The accumulator units were floral configurations of droplet-shaped balloons installed close to the bed of deep water. The research was carried out in two major parts: water flow over the balloons and flow produced by the bursting of the balloons. In the first part, three-dimensional simulations were conducted to investigate water flow over accumulators. The simulation was carried out at a free stream Reynolds number of 230,000 using URANS k – omega and LES Dyna – SM turbulence models. The structure of the flow was investigated using iso-surfaces of the second invariant of the velocity gradient and three-dimensional path lines. Several shedding vortex tubes were identified downstream of the balloons. The dynamics of these vortex tubes was further illustrated through time series snapshots containing vorticity lines on two-dimensional planes perpendicular to the flow direction. The frequency of the shedding and the turbulent movements of the vortex tubes were studied through power spectrum analysis of the force coefficients. In the second part, the flow produced by the bursting of balloons was studied experimentally using photographs taken by three cameras with speed of 60 frames per second at a resolution of 1080P. It was observed that if a sufficiently large air-filled balloon quickly burst underwater, a vortex ring bubble was generated. The effect of dimensionless surface tension on general characteristics of the vortex ring bubble including rise velocity, rate of expansion, circulation and trajectory was investigated. It was observed that as the dimensionless surface tension increased, the rise velocity, the circulation and consequently the stability of the vortex ring bubble increased; however, the rate of expansion tends toward constant values. A semi-analytical model was also developed suggesting that the vortex ring expansion is essentially due to the buoyancy force. An expression was also obtained for the circulation in terms of the initial volume of the balloon and the depth at which balloon bursts. Extending from the mentioned semi-analytical model, a perturbation analysis was performed to find an expression for the radius of the buoyant vortex rings. The radius equation includes two terms; the zeroth-order solution representing the effect of buoyancy, and the first-order perturbation correction describing the influence of viscosity. The zeroth-order solution is an explicit function of time; the first-order perturbation modification, however, includes the drag coefficient which is unknown and of interest. Fitting the photographically measured radius into the modified equation yields the time history of the drag coefficient of the corresponding buoyant vortex ring. Advisors/Committee Members: Ting, David, Carriveau, Rupp.

Subjects/Keywords: CFD; Computational Fluid Dynamics; Experimental Fluid Dynamics; Fluid mechanics; Vortex Dynamics; Vortex Ring

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APA (6^th Edition):

Vaselbehagh, A. (2015). Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant. (Doctoral Dissertation). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/5493

Chicago Manual of Style (16^th Edition):

Vaselbehagh, Ahmadreza. “Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant.” 2015. Doctoral Dissertation, University of Windsor. Accessed February 22, 2020. https://scholar.uwindsor.ca/etd/5493.

MLA Handbook (7^th Edition):

Vaselbehagh, Ahmadreza. “Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant.” 2015. Web. 22 Feb 2020.

Vancouver:

Vaselbehagh A. Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant. [Internet] [Doctoral dissertation]. University of Windsor; 2015. [cited 2020 Feb 22]. Available from: https://scholar.uwindsor.ca/etd/5493.

Council of Science Editors:

Vaselbehagh A. Hydrodynamics of Accumulators of Compressed Air for an UWCAES Plant. [Doctoral Dissertation]. University of Windsor; 2015. Available from: https://scholar.uwindsor.ca/etd/5493

University of New South Wales

8. Tkachenko, Svetlana. Coupling of radiation and natural convection in open-ended channel in application to building-integrated photovoltaic systems.

Degree: Mechanical & Manufacturing Engineering, 2018, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/62230 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58334/SOURCE02?view=true

► The control of temperatures of PV cells is a significant challenge in building-integrated photovoltaic (BIPV) systems. Double-skin façades provide an attractive and cost-effective solution in… (more)

▼ The control of temperatures of PV cells is a significant challenge in building-integrated photovoltaic (BIPV) systems. Double-skin façades provide an attractive and cost-effective solution in which an air gap is created between the PV modules and building wall. The objective of this thesis is to use computational simulations to improve the understanding of complex interaction of radiation with turbulent natural convective flow in the air gap and to enhance heat transfer by optimising interaction between the two mechanisms. A discrete ordinates model (DOM) for radiation transport together with a spectral line weighted sum of grey gases (SLW) model and a collocated interpolation module are adopted to evaluate the absorption properties of participating gases. As a result, wall-to-wall as well as participating gas radiation transfers are evaluated in a three-dimensional turbulent flow; the latter being calculated with a large eddy simulation (LES) formulation. Flow and thermal field development in time and space is attained to investigate the natural convection occurring in a three-dimensional vertical, open-ended, rectangular channel heated on one side which occurs in typical BIPV configurations. A parametric study with various wall emissivities with and without a participating medium is presented. Complex three-dimensional vortical structures are identified which directly affect the temperature distribution on the heated wall, suggesting that investigations of the centre plane behaviour only are not sufficient for understanding the heat transfer rates at the walls and the consequent behaviour of convective flows within the system away from the centre plane.When wall-to-wall radiation is introduced into the simulations, the unheated walls are impacted by the radiation from the heated wall. As a result, there is a very significant change in the vortical structures as well as averaged flow and thermal fields and the turbulence statistics. As the emissivity of the walls is increased the temperature of the heated wall is significantly reduced from a time and space averaged value of 62°C with the emissivity set to zero to 48°C when the emissivity of all the walls is set at 0.9. This change in the temperature can result in an increase in the efficiency of the PV cells of approximately 7%.It follows that the internal walls of BIPV systems should be lined with materials of as high an emissivity as is economically viable to optimise their efficiency and accelerate the take up by the building industry. Advisors/Committee Members: Timchenko, Victoria, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW, Yeoh, Guan, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW.

Subjects/Keywords: Natural convection; CFD; Renewable; Turbulence; Radiation; Computational modelling; Computational fluid dynamics

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APA (6^th Edition):

Tkachenko, S. (2018). Coupling of radiation and natural convection in open-ended channel in application to building-integrated photovoltaic systems. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/62230 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58334/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Tkachenko, Svetlana. “Coupling of radiation and natural convection in open-ended channel in application to building-integrated photovoltaic systems.” 2018. Doctoral Dissertation, University of New South Wales. Accessed February 22, 2020. http://handle.unsw.edu.au/1959.4/62230 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58334/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Tkachenko, Svetlana. “Coupling of radiation and natural convection in open-ended channel in application to building-integrated photovoltaic systems.” 2018. Web. 22 Feb 2020.

Vancouver:

Tkachenko S. Coupling of radiation and natural convection in open-ended channel in application to building-integrated photovoltaic systems. [Internet] [Doctoral dissertation]. University of New South Wales; 2018. [cited 2020 Feb 22]. Available from: http://handle.unsw.edu.au/1959.4/62230 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58334/SOURCE02?view=true.

Council of Science Editors:

Tkachenko S. Coupling of radiation and natural convection in open-ended channel in application to building-integrated photovoltaic systems. [Doctoral Dissertation]. University of New South Wales; 2018. Available from: http://handle.unsw.edu.au/1959.4/62230 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58334/SOURCE02?view=true

Penn State University

9. Banco, Gino G. MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS.

Degree: PhD, Mechanical Engineering, 2010, Penn State University

URL: https://etda.libraries.psu.edu/catalog/11436

► The primary roles of the small intestine (gut) are nutrient absorption and transport of digestive material (chyme). Two basic motility patterns (modes) exist to control… (more)

▼ The primary roles of the small intestine (gut) are nutrient absorption and transport of digestive material (chyme). Two basic motility patterns (modes) exist to control these transport phenomena: propulsive wave-like propagations peristalsis) for axial transport, and rhythmic contractions of short segments of the gut segmentation) for radial transport to the surface for absorption. Once nutrients are advected to the surface, however, they must diffuse through a low-velocity fluid layer known as the “unstirred (water) layer (UL).” The thickness of this layer has been reported up to ~1000 (micro)m, which, however, is physiologically unrealistic. More realistic studies have reported thicknesses of less than 50(micro)m, suggesting that a “highly efficient stirring mechanism” may be present in vivo to produce such small UL thicknesses. We hypothesize that finger-like projections (villi) on the intestinal surface, under active muscular control, generate a “micro-mixing-layer (MML)” which, when coupled with macro-scale mixing, can provide highly efficient stirring. We develop a physiologically accurate computational model to investigate the hypothesis. We use the lattice Boltzmann framework (LBM) to predict fluid and scalar motions, with moving boundary conditions, and zero-passive-scalar concentration at the epithelial surface to model rapid nutrient absorption. Using simpler gut models of flow generated by peristaltic and segmental motility (developed to establish technology needed for the combined multi-scale model), we show that the fluid mechanics-driven absorption dynamics of the small intestine is much more complex and interesting than has been previously reported. Contrary to common wisdom, over the physiological range of occlusion ratios (Rmin/Ravg, where Rmin and Ravg are minimum and average radius, respectively), both peristalsis and segmentation significantly promote nutrient absorption. Segmentation has long been associated with the absorption process, but peristalsis has been generally explained as only necessary for axial transport. We show that the propulsive mechanisms generated by peristalsis for axial transport also create high nutrient gradients near the surface. These nutrient gradients lead to absorption characteristics of peristaltic motility that can be comparable to, or even exceed those of segmental motility. However, we also show that to maximize absorption while minimizing the power required by the muscle contractions necessary for gut motility, segmentation is optimal over the range of physiologically relevant occlusion ratios. A three-dimensional, multi-scale lattice Boltzmann model was developed to study the effects of coupled macro-scale deformations and pendular villous motility on absorption. We show that active movements of the villi can enhance absorption by ~25% beyond passive villous movements induced by macro-scale motility patterns alone. Increasing the length or the frequency of oscillation enhances the effect. Consistent with the findings of our simplified 2D and 3D villous motility…

Subjects/Keywords: fluid dynamics; fluid mechanics; small intestine; lattice boltzmann; computational fluid dynamics (cfd)

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APA (6^th Edition):

Banco, G. G. (2010). MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11436

Chicago Manual of Style (16^th Edition):

Banco, Gino G. “MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS.” 2010. Doctoral Dissertation, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/11436.

MLA Handbook (7^th Edition):

Banco, Gino G. “MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS.” 2010. Web. 22 Feb 2020.

Vancouver:

Banco GG. MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS. [Internet] [Doctoral dissertation]. Penn State University; 2010. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/11436.

Council of Science Editors:

Banco GG. MULTI-SCALE FLUID MECHANICS OF NUTRIENT ABSORPTION IN THE SMALL INTESTINE ANALYZED WITH 2D AND 3D LATTICE BOLTZMANN MODELS. [Doctoral Dissertation]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/11436

Cal Poly

10. Guerra, Joel Tynan. Investigating the Effect of an Upstream Spheroid on Tandem Hydrofoils.

Degree: MS, Aerospace Engineering, 2018, Cal Poly

URL: https://digitalcommons.calpoly.edu/theses/1959 ; 10.15368/theses.2018.154

► This thesis documents a series of three dimensional unsteady Reynolds Averaged Navier-Stokes CFD simulations used to investigate the inﬂuence of an upstream prolate spheroid… (more)

Subjects/Keywords: CFD; aerodynamics; hydrodynamics; computational fluid dynamics; biomimicry; fluid dynamics; Aerodynamics and Fluid Mechanics

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APA (6^th Edition):

Guerra, J. T. (2018). Investigating the Effect of an Upstream Spheroid on Tandem Hydrofoils. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/1959 ; 10.15368/theses.2018.154

Chicago Manual of Style (16^th Edition):

Guerra, Joel Tynan. “Investigating the Effect of an Upstream Spheroid on Tandem Hydrofoils.” 2018. Masters Thesis, Cal Poly. Accessed February 22, 2020. https://digitalcommons.calpoly.edu/theses/1959 ; 10.15368/theses.2018.154.

MLA Handbook (7^th Edition):

Guerra, Joel Tynan. “Investigating the Effect of an Upstream Spheroid on Tandem Hydrofoils.” 2018. Web. 22 Feb 2020.

Vancouver:

Guerra JT. Investigating the Effect of an Upstream Spheroid on Tandem Hydrofoils. [Internet] [Masters thesis]. Cal Poly; 2018. [cited 2020 Feb 22]. Available from: https://digitalcommons.calpoly.edu/theses/1959 ; 10.15368/theses.2018.154.

Council of Science Editors:

Guerra JT. Investigating the Effect of an Upstream Spheroid on Tandem Hydrofoils. [Masters Thesis]. Cal Poly; 2018. Available from: https://digitalcommons.calpoly.edu/theses/1959 ; 10.15368/theses.2018.154

University of Western Australia

11. Keys, Matt. Establishing computational fluid dynamics models for swimming technique assessment.

Degree: PhD, 2010, University of Western Australia

URL: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=29616&local_base=GEN01-INS01

►

This thesis set out to create a three dimensional active computational fluid dynamics model capable of assessing swimming techniques and enhancing an understanding of the… (more)

▼

This thesis set out to create a three dimensional active computational fluid dynamics model capable of assessing swimming techniques and enhancing an understanding of the assessment capabilities of the model in practice. Over the past century, numerous studies have measured the passive and active drag of swimmers. Passive drag usually refers to the combination of pressure and viscous forces on a rigid body moving at a constant velocity through water. Active drag is usually described as the combined pressure and viscous forces acting on a swimming body travelling at constant or varying velocities through water. Due to the complexities in measuring active drag, the range of techniques used have not provided any definitive conclusions regarding the accuracy of any single measurement technique over another. More recently, an increased use of mathematical modelling has sought to improve estimates and understanding of active drag. One such method is to use Computational Fluid Dynamics (CFD), but to date simulations mostly have considered passive drag and quasi-static studies using isolated segments. This project focused on extending the technology by providing a full CFD simulation of the entire human body during a normal swimming stroke. It was completed via the following steps: 1. Setting up and validating a passive drag simulation of an elite swimmer. 2. Developing a mathematical algorithm for controlling the movements of the three dimensional model within the CFD environment. 3. Subsequently, using the above models to simulate increasingly complex movements in the sequence of: Dolphin kick underwater. Freestyle kick underwater. Freestyle kick near the water surface. Breaststroke kick underwater. Full freestyle stroke. A CFD model capable of all these steps was developed and the model validations revealed sufficient accuracies when analysing changes in active drag during swimming.

Hence, the study has advanced the quantitative understanding of how: The influence of segmental contribution to total drag and propulsion, while underwater kicking and freestyle swimming; particularly the effects of ankle flexibility and knee depth. The stroke symmetry in swimmers is related to the total stroke efficiency. The effects of different kicking techniques at the air-water interface to maximise propulsion. Wave effects change the distribution of drag over the body by increasing the drag to the upper sections of the body and decreasing it to the lower sections. The effect of segmental acceleration can act as a mechanism for developing propulsive forces in different movement patterns. Specific propulsion mechanisms in the freestyle arm-stroke rely on underwater pressure variations that are a result of precursor movements and the formation of a wave around the body. The CFD modelling procedure has the ability to allow for changes in the input variables and successfully trial different scenarios. This research used a case study approach with a small group of elite swimmers. With further advancements in kinematic data collection and a…

Subjects/Keywords: Swimming; Swimming; Computational fluid dynamics; Biomechanics; Swimming; CFD; Modelling; Dynamics

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APA (6^th Edition):

Keys, M. (2010). Establishing computational fluid dynamics models for swimming technique assessment. (Doctoral Dissertation). University of Western Australia. Retrieved from http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=29616&local_base=GEN01-INS01

Chicago Manual of Style (16^th Edition):

Keys, Matt. “Establishing computational fluid dynamics models for swimming technique assessment.” 2010. Doctoral Dissertation, University of Western Australia. Accessed February 22, 2020. http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=29616&local_base=GEN01-INS01.

MLA Handbook (7^th Edition):

Keys, Matt. “Establishing computational fluid dynamics models for swimming technique assessment.” 2010. Web. 22 Feb 2020.

Vancouver:

Keys M. Establishing computational fluid dynamics models for swimming technique assessment. [Internet] [Doctoral dissertation]. University of Western Australia; 2010. [cited 2020 Feb 22]. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=29616&local_base=GEN01-INS01.

Council of Science Editors:

Keys M. Establishing computational fluid dynamics models for swimming technique assessment. [Doctoral Dissertation]. University of Western Australia; 2010. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=29616&local_base=GEN01-INS01

Uppsala University

12. Jansson, Anders. CFD simulation of pool dynamics in a nuclear reactor's condensation pool.

Degree: Applied Nuclear Physics, 2014, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222832

► In a nuclear reactor the containment protects the environment from radioactive emissions. It is separated in two parts, a drywell and a wetwell. The… (more)

▼ In a nuclear reactor the containment protects the environment from radioactive emissions. It is separated in two parts, a drywell and a wetwell. The drywell contains the reactor vessel and the steam pipes. If a steam leakage occurs in this part of the containment the pressure will increase. To reduce the pressure raising the reactor safety system uses the pressure suppression principle. By this principle the steam is condensed in a condensation pool filled with water. This pool is located in the wetwell part of the containment. To connect the drywell and wetwell there are pipes connected between them. These pipes are submerged under the water level in the condensation pool. This means that steam will be blown down into the condensation pool if the pressure in the drywell exceeds the hydrostatic pressure at the pipe outlet in the pool. In this thesis the blow down process has been studied with computational fluid dynamics (CFD). The aim was to study the pressure distribution in the condensation pool during a blow down sequence. It is useful to know the pressure distribution and the size of the pressure oscillations to calculate the forces acting on components in the pool and the pool structure. The CFD method has also been compared to the current used method for this type of calculations. The current method at Westinghouse uses a program called SPIEGEL. Simulations have been made on a model of a blow down pipe and a condensation pool. This model is called the PPOOLEX facility and is set up at Lappeenranta University of Technology in Finland. The facility has a simplified design compared to a real system. The blow down pipe in the PPOOLEX facility has only opening in the bottom of the pipe while a real blow down pipe has several small holes scattered along the pipe wrap. One of the simulations made in this project was based on an experiment performed on the PPOOLEX facility. The results from the simulation were compared to the experimental results. In that experiment only air was blown in to the facility. Another simulation was made where steam was blown into the facility. Two different CFD solvers, CFX and STAR-CCM+, were used to perform the simulations. Because of the great need for computing power, however, mostly STAR-CCM+ was used. The result of the air simulation showed similar values of the pressure distribution as in experiment. During the simulation also temperatures were measured and compared to the experiment temperature measurements. In these results there were larger differences between the simulation and the experiment, especially for points located in air. Graphic illustrations of volume fractions and pressures in the facility were produced during the simulation. When steam was used as a source fluid in the simulation some problems appeared in the solution. The CFD software had problems to get a converging solution, probably due to incomplete or incorrect settings for the solver. The conclusions of this thesis are that CFD can be used to simulate an air blow down…

Subjects/Keywords: CFD; computational fluid dynamics; condensation pool; pool dynamics; nuclear reactor; CFD; beräkningsströmningsdynamik; kondensationsbassäng; pooldynamik; kärnkraftsreaktor

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APA (6^th Edition):

Jansson, A. (2014). CFD simulation of pool dynamics in a nuclear reactor's condensation pool. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222832

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jansson, Anders. “CFD simulation of pool dynamics in a nuclear reactor's condensation pool.” 2014. Thesis, Uppsala University. Accessed February 22, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222832.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jansson, Anders. “CFD simulation of pool dynamics in a nuclear reactor's condensation pool.” 2014. Web. 22 Feb 2020.

Vancouver:

Jansson A. CFD simulation of pool dynamics in a nuclear reactor's condensation pool. [Internet] [Thesis]. Uppsala University; 2014. [cited 2020 Feb 22]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222832.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jansson A. CFD simulation of pool dynamics in a nuclear reactor's condensation pool. [Thesis]. Uppsala University; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222832

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

13. Kůrečka, Jan. Zlepšení hydraulických vlastností vírových turbin .

Degree: 2016, Brno University of Technology

URL: http://hdl.handle.net/11012/60799

► Tato diplomová práce se zabývá návrhem geometrie lopatek oběžného kola vírové turbíny pro různě hustou lopatkovou mříž na dané parametry Q11 = 1,9 [m3s-1], n11 = 170 [min-1], H = 2,5 m ,… (more)

Subjects/Keywords: Vírová turbína; hustota lopatkové mříže; CFD(Computational fluid dynamics).; Swirl turbine; blade row density; CFD(Computational fluid dynamics).

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APA (6^th Edition):

Kůrečka, J. (2016). Zlepšení hydraulických vlastností vírových turbin . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/60799

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kůrečka, Jan. “Zlepšení hydraulických vlastností vírových turbin .” 2016. Thesis, Brno University of Technology. Accessed February 22, 2020. http://hdl.handle.net/11012/60799.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kůrečka, Jan. “Zlepšení hydraulických vlastností vírových turbin .” 2016. Web. 22 Feb 2020.

Vancouver:

Kůrečka J. Zlepšení hydraulických vlastností vírových turbin . [Internet] [Thesis]. Brno University of Technology; 2016. [cited 2020 Feb 22]. Available from: http://hdl.handle.net/11012/60799.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kůrečka J. Zlepšení hydraulických vlastností vírových turbin . [Thesis]. Brno University of Technology; 2016. Available from: http://hdl.handle.net/11012/60799

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Western Australia

14. Horko, Michael. CFD optimisation of an oscillating water column wave energy converter.

Degree: M. Eng.Sc., 2007, University of Western Australia

URL: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=9881&local_base=GEN01-INS01

►

Although oscillating water column type wave energy devices are nearing the stage of commercial exploitation, there is still much to be learnt about many facets… (more)

▼

Although oscillating water column type wave energy devices are nearing the stage of commercial exploitation, there is still much to be learnt about many facets of their hydrodynamic performance. This research uses the commercially available FLUENT computational fluid dynamics flow solver to model a complete OWC system in a two dimensional numerical wave tank. A key feature of the numerical modelling is the focus on the influence of the front wall geometry and in particular the effect of the front wall aperture shape on the hydrodynamic conversion efficiency. In order to validate the numerical modelling, a 1:12.5 scale experimental model has been tested in a wave tank under regular wave conditions. The effects of the front lip shape on the hydrodynamic efficiency are investigated both numerically and experimentally and the results compared. The results obtained show that with careful consideration of key modelling parameters as well as ensuring sufficient data resolution, there is good agreement between the two methods. The results of the testing have also illustrated that simple changes to the front wall aperture shape can provide marked improvements in the efficiency of energy capture for OWC type devices.

Subjects/Keywords: Ocean wave power; Computational fluid dynamics; Hydrodynamics; Fluid dynamics; Wave energy; Hydrodynamic efficiency; Computational fluid dynamics (CFD); Oscillating water column (OWC)

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APA (6^th Edition):

Horko, M. (2007). CFD optimisation of an oscillating water column wave energy converter. (Masters Thesis). University of Western Australia. Retrieved from http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=9881&local_base=GEN01-INS01

Chicago Manual of Style (16^th Edition):

Horko, Michael. “CFD optimisation of an oscillating water column wave energy converter.” 2007. Masters Thesis, University of Western Australia. Accessed February 22, 2020. http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=9881&local_base=GEN01-INS01.

MLA Handbook (7^th Edition):

Horko, Michael. “CFD optimisation of an oscillating water column wave energy converter.” 2007. Web. 22 Feb 2020.

Vancouver:

Horko M. CFD optimisation of an oscillating water column wave energy converter. [Internet] [Masters thesis]. University of Western Australia; 2007. [cited 2020 Feb 22]. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=9881&local_base=GEN01-INS01.

Council of Science Editors:

Horko M. CFD optimisation of an oscillating water column wave energy converter. [Masters Thesis]. University of Western Australia; 2007. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=9881&local_base=GEN01-INS01

The Ohio State University

15. Barrows, Sean Thomas. TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling.

Degree: MS, Aeronautical and Astronautical Engineering, 2008, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1213373781

► Two new turbulence models have been implemented in the turbomachinery flow simulation code TURBO. This paper focuses on the validation and implementation of the… (more)

Subjects/Keywords: Engineering; Fluid Dynamics; TURBO; CFD; tip-gap modeling; computational fluid dynamics; turbulence modeling

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APA (6^th Edition):

Barrows, S. T. (2008). TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1213373781

Chicago Manual of Style (16^th Edition):

Barrows, Sean Thomas. “TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling.” 2008. Masters Thesis, The Ohio State University. Accessed February 22, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213373781.

MLA Handbook (7^th Edition):

Barrows, Sean Thomas. “TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling.” 2008. Web. 22 Feb 2020.

Vancouver:

Barrows ST. TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling. [Internet] [Masters thesis]. The Ohio State University; 2008. [cited 2020 Feb 22]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1213373781.

Council of Science Editors:

Barrows ST. TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling. [Masters Thesis]. The Ohio State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1213373781

16. Pardue, Juliette Kelly. Parallel Two-Dimensional Unstructured Anisotropic Delaunay Mesh Generation for Aerospace Applications.

Degree: MS, Computer Science, 2015, Old Dominion University

URL: https://digitalcommons.odu.edu/computerscience_etds/31

► A bottom-up approach to parallel anisotropic mesh generation is presented by building a mesh generator from the principles of point-insertion, triangulation, and Delaunay refinement.… (more)

Subjects/Keywords: Parallel anisotropic mesh generation; Delaunay refinement; Computational fluid dynamics; CFD simulations; Computer Sciences; Fluid Dynamics

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APA (6^th Edition):

Pardue, J. K. (2015). Parallel Two-Dimensional Unstructured Anisotropic Delaunay Mesh Generation for Aerospace Applications. (Thesis). Old Dominion University. Retrieved from https://digitalcommons.odu.edu/computerscience_etds/31

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pardue, Juliette Kelly. “Parallel Two-Dimensional Unstructured Anisotropic Delaunay Mesh Generation for Aerospace Applications.” 2015. Thesis, Old Dominion University. Accessed February 22, 2020. https://digitalcommons.odu.edu/computerscience_etds/31.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pardue, Juliette Kelly. “Parallel Two-Dimensional Unstructured Anisotropic Delaunay Mesh Generation for Aerospace Applications.” 2015. Web. 22 Feb 2020.

Vancouver:

Pardue JK. Parallel Two-Dimensional Unstructured Anisotropic Delaunay Mesh Generation for Aerospace Applications. [Internet] [Thesis]. Old Dominion University; 2015. [cited 2020 Feb 22]. Available from: https://digitalcommons.odu.edu/computerscience_etds/31.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pardue JK. Parallel Two-Dimensional Unstructured Anisotropic Delaunay Mesh Generation for Aerospace Applications. [Thesis]. Old Dominion University; 2015. Available from: https://digitalcommons.odu.edu/computerscience_etds/31

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cincinnati

17. Heberling, Brian. A Numerical Analysis on the Effects of Self-Excited Tip Flow Unsteadiness and Upstream Blade Row Interactions on the Performance Predictions of a Transonic Compressor.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2017, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin150479438822623

► Computational fluid dynamics (CFD) simulations can offer a detailed view of the complex flow fields within an axial compressor and greatly aid the design process.… (more)

Subjects/Keywords: Aerospace Materials; computational fluid dynamics; turbomachinery; transonic compressor; cfd; compressor stall

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APA (6^th Edition):

Heberling, B. (2017). A Numerical Analysis on the Effects of Self-Excited Tip Flow Unsteadiness and Upstream Blade Row Interactions on the Performance Predictions of a Transonic Compressor. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin150479438822623

Chicago Manual of Style (16^th Edition):

Heberling, Brian. “A Numerical Analysis on the Effects of Self-Excited Tip Flow Unsteadiness and Upstream Blade Row Interactions on the Performance Predictions of a Transonic Compressor.” 2017. Masters Thesis, University of Cincinnati. Accessed February 22, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin150479438822623.

MLA Handbook (7^th Edition):

Heberling, Brian. “A Numerical Analysis on the Effects of Self-Excited Tip Flow Unsteadiness and Upstream Blade Row Interactions on the Performance Predictions of a Transonic Compressor.” 2017. Web. 22 Feb 2020.

Vancouver:

Heberling B. A Numerical Analysis on the Effects of Self-Excited Tip Flow Unsteadiness and Upstream Blade Row Interactions on the Performance Predictions of a Transonic Compressor. [Internet] [Masters thesis]. University of Cincinnati; 2017. [cited 2020 Feb 22]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin150479438822623.

Council of Science Editors:

Heberling B. A Numerical Analysis on the Effects of Self-Excited Tip Flow Unsteadiness and Upstream Blade Row Interactions on the Performance Predictions of a Transonic Compressor. [Masters Thesis]. University of Cincinnati; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin150479438822623

18. He, Xiaoliang. CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models.

Degree: MS, Mechanical Engineering, 2013, Oregon State University

URL: http://hdl.handle.net/1957/36138

► With continued development of the electronic industry, the demand for highly efficient heat removal solutions requires innovative cooling technologies. A computational fluid dynamic (CFD) study,… (more)

▼ With continued development of the electronic industry, the demand for highly efficient heat removal solutions requires innovative cooling technologies. A computational fluid dynamic (CFD) study, including heat transfer, is performed for an axisymmetric, confined jet impingement experiencing boiling and coupled with vapor extraction. Boiling occurs at the target surface while extraction occurs at the wall confining the radial flow. The region between the target and confining wall is defined as a confined gap. Extraction is employed to enhance heat transfer and to minimize the potential negative influence of flow instabilities resulting from two-phase flow within a confined region. A three-dimensional sector of the confined jet is employed in the simulation. A single circular impinging jet with a constant jet diameter (4 mm) and variable gap height (0.5, 1.0 and 1.5 mm), also known as nozzle-to-target spacing, is considered. The effect of mass flux at the confined gap entrance is also investigated (200, 400 and 800 kg/m²-s) for a range of heat flux (5 to 50 W/cm²). Fluid flow and heat transfer are simulated using the Volume of Fluid (VOF) model and the wall-boiling sub-model within the Multiphase Segregated Flow (MSF) model. The boiling sub-model in the VOF model applies the Rohsenow boiling correlation, while in the MSF model, the Kurul-Podowski boiling sub-model is used. Also, vapor extraction is realized by different mechanisms for these two models. For the VOF model, a specific phase "wall porosity" can be assigned to a wall to make it porous. Over a range of pressure differentials across this porous wall such that the inertial transport influence is negligible, vapor transport should agree with Darcy's law. For the MSF model, a wall can be made permeability to one substance or phase while remaining impermeable to the other substance or phase. However, a portion of the substance or phase reaching the boundary allowed to pass through the surface must be specified. A pressure drop cannot be applied across the wall, thereby prohibiting Darcy flow modeling. The solutions of both models are at steady state. The boiling curves without vapor extraction from both models are provided and compared to experiments. Simulations matching experimental wall temperatures under-predict theoretical vapor generation and those matching vapor generation over-estimate wall superheat. For cases with no extraction, local temperature and velocity profiles from the VOF model are provided at several radial locations within the confined gap. Scalar temperature and pressure distributions and velocity vectors are presented to explain observations in profiles. Advisors/Committee Members: Pence, Debroah V. (advisor), Liburdy, James (committee member).

Subjects/Keywords: CFD; Computational fluid dynamics

…3 2.1.2 Single-Phase Computational Studies… …12 2.2.2 Two-Phase Computational Studies… …15 2.3.2 Computational Extraction Studies… …22 3.3.1 Computational domain… …23 3.3.2 Computational mesh…

10 more images…

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APA (6^th Edition):

He, X. (2013). CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/36138

Chicago Manual of Style (16^th Edition):

He, Xiaoliang. “CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models.” 2013. Masters Thesis, Oregon State University. Accessed February 22, 2020. http://hdl.handle.net/1957/36138.

MLA Handbook (7^th Edition):

He, Xiaoliang. “CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models.” 2013. Web. 22 Feb 2020.

Vancouver:

He X. CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models. [Internet] [Masters thesis]. Oregon State University; 2013. [cited 2020 Feb 22]. Available from: http://hdl.handle.net/1957/36138.

Council of Science Editors:

He X. CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models. [Masters Thesis]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/36138

University of Illinois – Urbana-Champaign

19. Mallikarjun Vagishwari, Shrutakeerti. Modeling of non-equilibrium effects on a double wedge configuration in hypersonic flows.

Degree: MS, Aerospace Engineering, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/78581

► Numerical simulations are extensively used for the modeling of hypersonic flows characterized by thermal and chemical non-equilibrium phenomena. The accurate modeling of non-equilibrium effects relies… (more)

Subjects/Keywords: non-equilibrium; double wedge; Computational Fluid Dynamics (CFD); hypersonics

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APA (6^th Edition):

Mallikarjun Vagishwari, S. (2015). Modeling of non-equilibrium effects on a double wedge configuration in hypersonic flows. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/78581

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mallikarjun Vagishwari, Shrutakeerti. “Modeling of non-equilibrium effects on a double wedge configuration in hypersonic flows.” 2015. Thesis, University of Illinois – Urbana-Champaign. Accessed February 22, 2020. http://hdl.handle.net/2142/78581.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mallikarjun Vagishwari, Shrutakeerti. “Modeling of non-equilibrium effects on a double wedge configuration in hypersonic flows.” 2015. Web. 22 Feb 2020.

Vancouver:

Mallikarjun Vagishwari S. Modeling of non-equilibrium effects on a double wedge configuration in hypersonic flows. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2015. [cited 2020 Feb 22]. Available from: http://hdl.handle.net/2142/78581.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mallikarjun Vagishwari S. Modeling of non-equilibrium effects on a double wedge configuration in hypersonic flows. [Thesis]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/78581

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Illinois – Urbana-Champaign

20. Ranjan, Prateek. Computational analysis of planar wings designed for optimum span-load.

Degree: MS, Aerospace Engineering, 2016, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/92983

► A computational analysis of three span-optimized wings was conducted using an open-source CFD tool. Simulations were carried out at Rec = 450; 000 in a… (more)

Subjects/Keywords: OpenFOAM; Pointwise; Flow transition; Wings; Span-load; Computational fluid dynamics (CFD)

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APA (6^th Edition):

Ranjan, P. (2016). Computational analysis of planar wings designed for optimum span-load. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/92983

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ranjan, Prateek. “Computational analysis of planar wings designed for optimum span-load.” 2016. Thesis, University of Illinois – Urbana-Champaign. Accessed February 22, 2020. http://hdl.handle.net/2142/92983.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ranjan, Prateek. “Computational analysis of planar wings designed for optimum span-load.” 2016. Web. 22 Feb 2020.

Vancouver:

Ranjan P. Computational analysis of planar wings designed for optimum span-load. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2016. [cited 2020 Feb 22]. Available from: http://hdl.handle.net/2142/92983.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ranjan P. Computational analysis of planar wings designed for optimum span-load. [Thesis]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/92983

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology

21. Prosser, Daniel. Flapping wing design for a dragonfly-like micro air vehicle.

Degree: Mechanical Engineering, 2011, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/5804

► In this thesis, the aerodynamics of the Quad-Wing Vehicle, a Micro Air Vehicle designed to hover with four flapping wings in a dragonfly-like configuration, is… (more)

Subjects/Keywords: Bio-inspired; CFD; Computational fluid dynamics; Flapping; MAV; Micro air vehicle

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APA (6^th Edition):

Prosser, D. (2011). Flapping wing design for a dragonfly-like micro air vehicle. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/5804

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Prosser, Daniel. “Flapping wing design for a dragonfly-like micro air vehicle.” 2011. Thesis, Rochester Institute of Technology. Accessed February 22, 2020. https://scholarworks.rit.edu/theses/5804.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Prosser, Daniel. “Flapping wing design for a dragonfly-like micro air vehicle.” 2011. Web. 22 Feb 2020.

Vancouver:

Prosser D. Flapping wing design for a dragonfly-like micro air vehicle. [Internet] [Thesis]. Rochester Institute of Technology; 2011. [cited 2020 Feb 22]. Available from: https://scholarworks.rit.edu/theses/5804.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Prosser D. Flapping wing design for a dragonfly-like micro air vehicle. [Thesis]. Rochester Institute of Technology; 2011. Available from: https://scholarworks.rit.edu/theses/5804

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

RMIT University

22. Tehzeeb, A. Evaluation of brick kiln performances using computational fluid dynamics (CFD).

Degree: 2013, RMIT University

URL: http://researchbank.rmit.edu.au/view/rmit:160496

► Modern history of civilization is concurrent to the use of brick and its manufacturing. BrickÂ kiln is the most important component in the manufacturing of clay-burnt… (more)

▼ Modern history of civilization is concurrent to the use of brick and its manufacturing. BrickÂ kiln is the most important component in the manufacturing of clay-burnt bricks. PoorlyÂ operated brick kilns are considered as the major sources of greenhouse gas (GHG) emissionÂ nowadays. Various types of brick kilns are in operation throughout the world. Tunnel kiln isÂ the most widely used technology in developed countries as it is highly automated. OtherÂ technologies which are quite popular in developing countries are: Hoffman kiln, VerticalÂ Shaft kiln, Fixed Chimney kiln, Zigzag kiln, etc. Computational Fluid Dynamics (CFD) software, ANSYS CFX is being applied to evaluateÂ performance of Tunnel kiln using natural gas as its fuel. The idea of a typical Tunnel kilnÂ layout geometry has been envisaged from local brick industries. The length, width and heightÂ of the Tunnel kiln geometry are taken as 100 m Ã— 3.24 m Ã— 1.48 m. The length and width ofÂ the brick stack is taken as 920 mm Ã— 440 mm. With a gap of 400 mm and 100 mm betweenÂ two brick stacks longitudinally and laterally respectively, a total of 450 (6 Ã— 75) stacks can beÂ accommodated inside the kiln at a time. Brick stack height including the kiln car height isÂ taken as 1.38 m. There is a clearance of 100 mm between the stack and the kiln roof. ToÂ produce certain quality bricks/ceramics, a particular temperature distribution throughout theÂ kiln needs to be maintained. This temperature distribution with respect to the kiln length isÂ known as Tunnel kiln curve. To achieve the Tunnel kiln curve obtained from industry forÂ ordinary brick type, some design parameters need to be optimized for a given geometry.Â Selection of these optimized design parameters are obtained through a series of trial and errorÂ runs of the CFD model. The total length of the tunnel can be divided into pre-heating, firingÂ and cooling zones. Green bricks pass through the pre-heating, then firing and finally theÂ cooling zones, while fresh air flows in opposite direction of the brick stack move. It is to beÂ noted that brick industries are very reluctant to disclose any of those technical secrets relatedÂ to their brick kiln design. In this regard, this design is based on initial guesses of thoseÂ parameters and slowly come up with best performing scenario with respect to consideredÂ Tunnel kiln curve. To achieve the Tunnel kiln curve, the design parameters that need to be played around are gasÂ and air flow rates, flow directions, their inlet-outlet number, spacing and placements atÂ different locations of the kiln are considered very crucial. Other important parameters that areÂ varied include brick stack placement with respect to air and gas inlet-outlets, gaps betweenÂ ivÂ kiln roof and stacks and gaps between two consecutive stacks. To supply adequate air, a largeÂ rectangular air inlet with an area of 0.8 m2 is placed at the roof of the exit end of the kiln. ToÂ maintain the air temperature distribution as given in Tunnel kiln curve, one intermediate sizeÂ air outlet with…

Subjects/Keywords: Fields of Research; Computational Fluid Dynamics (CFD); Design optimization; Tunnel kiln

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APA (6^th Edition):

Tehzeeb, A. (2013). Evaluation of brick kiln performances using computational fluid dynamics (CFD). (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:160496

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tehzeeb, A. “Evaluation of brick kiln performances using computational fluid dynamics (CFD).” 2013. Thesis, RMIT University. Accessed February 22, 2020. http://researchbank.rmit.edu.au/view/rmit:160496.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tehzeeb, A. “Evaluation of brick kiln performances using computational fluid dynamics (CFD).” 2013. Web. 22 Feb 2020.

Vancouver:

Tehzeeb A. Evaluation of brick kiln performances using computational fluid dynamics (CFD). [Internet] [Thesis]. RMIT University; 2013. [cited 2020 Feb 22]. Available from: http://researchbank.rmit.edu.au/view/rmit:160496.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tehzeeb A. Evaluation of brick kiln performances using computational fluid dynamics (CFD). [Thesis]. RMIT University; 2013. Available from: http://researchbank.rmit.edu.au/view/rmit:160496

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

23. Stergiou, Jonathan Chris. Numerical Simulations of Two-Dimensional Laminar Flow Over Bluff Bodies Using the Immersed Boundary Method with Cartesian Grids.

Degree: MS, Aerospace Engineering, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/9296

► The details of flow past bluff bodies are investigated with two computational fluid dynamics solvers. The first computational code is the NPHASE-PSU code, a face-based,… (more)

▼ The details of flow past bluff bodies are investigated with two computational fluid dynamics solvers. The first computational code is the NPHASE-PSU code, a face-based, fully unstructured, second order discretized, implicit, finite volume fluid dynamics solver. The second is the CARIBOU code, a node based, structured, fourth order discretized, explicit, finite element fluid dynamics solver. The implementation of the immersed boundary method is assessed within the framework of NPHASE-PSU through comparisons of flowfields modeled both with and without the use of the immersed boundary method. The initial test case consists of steady state two-dimensional laminar flow past a circular cylinder (Re=1). The flowfield is solved initially by using a standard boundary approach on a body-fitted grid. A subsequent study uses a similar body-fitted grid with the immersed boundary method. Finally, a uniform Cartesian grid is coupled with the immersed boundary method. The three flow solutions are compared and their velocity fields and flowfield symmetries are examined in detail. The result of the investigation shows that these three test cases yield nearly identical solutions, indicating that all approaches correctly calculate flow in this regime. The second experimental case involves transient calculation of two-dimensional laminar flow past a circular cylinder (Re=100). This experimental setup is examined using a body-fitted grid and standard boundary, body-fitted grid and immersed boundary, and two separate analyses of uniform Cartesian grids and immersed boundaries (the second analysis here is performed in CARIBOU). The solutions are compared to eachother and to experimental data by analyzing velocity fields, drag and lift coefficients (viscous, pressure, and total), and vortex shedding frequency. All cases possess closely matching velocity fields and Strouhal numbers. The standard boundary case matches experimental data regarding lift and drag coefficients with high accuracy. The two immersed boundary cases run in NPHASE-PSU, as well as the CARIBOU case also agree closely with experimental data, indicating that all numerical models correctly represent the physical flowfields. The final experimental case involves transient calculation of two-dimensional laminar flow past a square cylinder (Re=100). This experiment, like the previously discussed cases, involves solutions that use both standard and immersed boundary methods, both in NPHASE-PSU and CARIBOU. All cases possess accurate velocity fields and Strouhal numbers. The standard boundary case matches the CARIBOU immersed boundary case with close accuracy. The two immersed boundary cases run in NPHASE-PSU, as well as the CARIBOU case, also agree closely with each other, indicating that all numerical models correctly represent the physical flowfields.

Subjects/Keywords: fluid; computational; cylinder; immersed boundary; cfd; dynamics; bluff body

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APA (6^th Edition):

Stergiou, J. C. (2008). Numerical Simulations of Two-Dimensional Laminar Flow Over Bluff Bodies Using the Immersed Boundary Method with Cartesian Grids. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/9296

Chicago Manual of Style (16^th Edition):

Stergiou, Jonathan Chris. “Numerical Simulations of Two-Dimensional Laminar Flow Over Bluff Bodies Using the Immersed Boundary Method with Cartesian Grids.” 2008. Masters Thesis, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/9296.

MLA Handbook (7^th Edition):

Stergiou, Jonathan Chris. “Numerical Simulations of Two-Dimensional Laminar Flow Over Bluff Bodies Using the Immersed Boundary Method with Cartesian Grids.” 2008. Web. 22 Feb 2020.

Vancouver:

Stergiou JC. Numerical Simulations of Two-Dimensional Laminar Flow Over Bluff Bodies Using the Immersed Boundary Method with Cartesian Grids. [Internet] [Masters thesis]. Penn State University; 2008. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/9296.

Council of Science Editors:

Stergiou JC. Numerical Simulations of Two-Dimensional Laminar Flow Over Bluff Bodies Using the Immersed Boundary Method with Cartesian Grids. [Masters Thesis]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/9296

Penn State University

24. Koncoski, Jeremy J. A REDUCED ORDER MODEL OF PROPELLER UNSTEADY FORCES FOR COMPUTATIONAL FLUID DYNAMICS SIMULATIONS.

Degree: MS, Mechanical Engineering, 2010, Penn State University

URL: https://etda.libraries.psu.edu/catalog/10369

► Propellers generate unsteady forces and moments when operating in flowfields containing spatial and temporal variation. Time-accurate simulation of propeller unsteady forces using a viscous flow… (more)

▼ Propellers generate unsteady forces and moments when operating in flowfields containing spatial and temporal variation. Time-accurate simulation of propeller unsteady forces using a viscous flow solver requires an expensive, full-wheel, dynamic grid of the rotating geometry. These computational costs can be reduced by modeling the propeller unsteady force response using a volumetric body force representation of the propeller. Existing body force models are only quasi-steady, defining propeller powering using open-water operating curves. Other methods specify the unsteady body force by linking to separate lifting-surface simulations of the propeller, which are expensive. Therefore, integrating a propeller unsteady-body-force model with a viscous flow solver can simplify gridding and reduce computational costs for maneuvering and sea-keeping simulations of ships and submarines, which are characterized by propeller inflow variations. This work calibrates an unsteady, sharp-edged gust response model for low-aspect ratio blades in sheared flow, typical of turbomachinery applications. The gust-response model is integrated with an existing, steady, body-force representation of a propeller in a viscous flow solver. The resulting unsteady-body-force model is validated against geometrically-resolved, unsteady simulations of a propeller in spatially-varying flow. The unsteady-body-force model correctly predicts propeller unsteady force and moment directionality based on inflow harmonic content. The magnitude and phase of forces and moments generated by the unsteady-body-force model compare well with geometrically-resolved, unsteady simulations, and match published results from unsteady lifting-surface codes. The unsteady-body-force model reduces computational costs and grid size by 44% relative to the geometrically-resolved, unsteady simulation. The current work yields a 50% improvement in accuracy over gust-response models for infinite wings, and eliminates effective wake calculations required by lifting-surface codes.

Subjects/Keywords: propeller; unsteady force; model; CFD; computational fluid dynamics

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APA (6^th Edition):

Koncoski, J. J. (2010). A REDUCED ORDER MODEL OF PROPELLER UNSTEADY FORCES FOR COMPUTATIONAL FLUID DYNAMICS SIMULATIONS. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/10369

Chicago Manual of Style (16^th Edition):

Koncoski, Jeremy J. “A REDUCED ORDER MODEL OF PROPELLER UNSTEADY FORCES FOR COMPUTATIONAL FLUID DYNAMICS SIMULATIONS.” 2010. Masters Thesis, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/10369.

MLA Handbook (7^th Edition):

Koncoski, Jeremy J. “A REDUCED ORDER MODEL OF PROPELLER UNSTEADY FORCES FOR COMPUTATIONAL FLUID DYNAMICS SIMULATIONS.” 2010. Web. 22 Feb 2020.

Vancouver:

Koncoski JJ. A REDUCED ORDER MODEL OF PROPELLER UNSTEADY FORCES FOR COMPUTATIONAL FLUID DYNAMICS SIMULATIONS. [Internet] [Masters thesis]. Penn State University; 2010. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/10369.

Council of Science Editors:

Koncoski JJ. A REDUCED ORDER MODEL OF PROPELLER UNSTEADY FORCES FOR COMPUTATIONAL FLUID DYNAMICS SIMULATIONS. [Masters Thesis]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/10369

Penn State University

25. Erwin, James Paul. Trailing Edge Noise Prediction Using The Nonlinear Disturbance Equations.

Degree: MS, Aerospace Engineering, 2009, Penn State University

URL: https://etda.libraries.psu.edu/catalog/9088

► Direct computation of broadband noise in reasonable computational times is possible if the calculations can be focused in a specific noise making region of interest.… (more)

Subjects/Keywords: computational; acoustics; prediction; edge; trailing; noise; broadband; cfd; fluid; dynamics

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APA (6^th Edition):

Erwin, J. P. (2009). Trailing Edge Noise Prediction Using The Nonlinear Disturbance Equations. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/9088

Chicago Manual of Style (16^th Edition):

Erwin, James Paul. “Trailing Edge Noise Prediction Using The Nonlinear Disturbance Equations.” 2009. Masters Thesis, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/9088.

MLA Handbook (7^th Edition):

Erwin, James Paul. “Trailing Edge Noise Prediction Using The Nonlinear Disturbance Equations.” 2009. Web. 22 Feb 2020.

Vancouver:

Erwin JP. Trailing Edge Noise Prediction Using The Nonlinear Disturbance Equations. [Internet] [Masters thesis]. Penn State University; 2009. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/9088.

Council of Science Editors:

Erwin JP. Trailing Edge Noise Prediction Using The Nonlinear Disturbance Equations. [Masters Thesis]. Penn State University; 2009. Available from: https://etda.libraries.psu.edu/catalog/9088

Penn State University

26. Kinzel, Michael Patrick. Computational Techniques and Analysis of Cavitating-Fluid Flows.

Degree: PhD, Aerospace Engineering, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/8854

► A new numerical approach is presented and validated for valid for compressible- cavitating-fluid flows. The method employs modern interface capturing and computational mesh methods that… (more)

Subjects/Keywords: Cavitation; Multiphase flows; level set; overset grids; computational fluid dynamics (CFD)

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APA (6^th Edition):

Kinzel, M. P. (2008). Computational Techniques and Analysis of Cavitating-Fluid Flows. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/8854

Chicago Manual of Style (16^th Edition):

Kinzel, Michael Patrick. “Computational Techniques and Analysis of Cavitating-Fluid Flows.” 2008. Doctoral Dissertation, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/8854.

MLA Handbook (7^th Edition):

Kinzel, Michael Patrick. “Computational Techniques and Analysis of Cavitating-Fluid Flows.” 2008. Web. 22 Feb 2020.

Vancouver:

Kinzel MP. Computational Techniques and Analysis of Cavitating-Fluid Flows. [Internet] [Doctoral dissertation]. Penn State University; 2008. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/8854.

Council of Science Editors:

Kinzel MP. Computational Techniques and Analysis of Cavitating-Fluid Flows. [Doctoral Dissertation]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/8854

Penn State University

27. Shanks, Matthew Ferrell. Cavitation Modeling on the Automotive Torque Converter using Computational Fluid Dynamics with a Mixing Plane Approach.

Degree: MS, Aerospace Engineering, 2014, Penn State University

URL: https://etda.libraries.psu.edu/catalog/22407

► The automotive torque converter is a fluid coupling device used to transfer power, with multiplication of torque, from the engine to the transmission. Cavitation is… (more)

Subjects/Keywords: Cavitation; Torque Converter; Computational Fluid Dynamics; CFD; Mixing Plane

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shanks, M. F. (2014). Cavitation Modeling on the Automotive Torque Converter using Computational Fluid Dynamics with a Mixing Plane Approach. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/22407

Chicago Manual of Style (16^th Edition):

Shanks, Matthew Ferrell. “Cavitation Modeling on the Automotive Torque Converter using Computational Fluid Dynamics with a Mixing Plane Approach.” 2014. Masters Thesis, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/22407.

MLA Handbook (7^th Edition):

Shanks, Matthew Ferrell. “Cavitation Modeling on the Automotive Torque Converter using Computational Fluid Dynamics with a Mixing Plane Approach.” 2014. Web. 22 Feb 2020.

Vancouver:

Shanks MF. Cavitation Modeling on the Automotive Torque Converter using Computational Fluid Dynamics with a Mixing Plane Approach. [Internet] [Masters thesis]. Penn State University; 2014. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/22407.

Council of Science Editors:

Shanks MF. Cavitation Modeling on the Automotive Torque Converter using Computational Fluid Dynamics with a Mixing Plane Approach. [Masters Thesis]. Penn State University; 2014. Available from: https://etda.libraries.psu.edu/catalog/22407

Penn State University

28. Lampenfield, Jacob John. Simulations of the flow generated by fluidic inserts in a converging diverging nozzle.

Degree: MS, Aerospace Engineering, 2016, Penn State University

URL: https://etda.libraries.psu.edu/catalog/29170

► This investigation of military jet noise prediction and reduction is a continuation from previous projects and is still ongoing. Numerical simulations have been performed on… (more)

▼ This investigation of military jet noise prediction and reduction is a continuation from previous projects and is still ongoing. Numerical simulations have been performed on baseline nozzles and nozzles with the addition of fluidic inserts. The design Mach number of the nozzle is 1.65, but only the over-expanded Mach number of 1.36 has been analyzed. The fluidic inserts have been generated using different numbers of injectors and injector hole sizes. The supersonic military style jet simulation makes use of advanced meshes combined with CFD technology. Steady Reynolds-averaged Navier-Stokes (RANS) simulations are produced by the CFD technology and used to predict and understand the flow field. Through collaboration with experimental noise measurements, a correlation between flow field properties and noise reduction is examined. The ANSYS suite is used to create grids and run simulations by using ANSYS-ICEM and ANSYS-CFX respectively. The geometry of the nozzle is modeled using an unstructured hexahedral mesh. The Menter SST turbulence model with a wall function is used inside of the CFX-Solver. The objective is to further simulate a military-style nozzle, similar to the GE F404 family, with added fluidic inserts. Previous simulations have been conducted and new simulations were planned and performed based on information gathered from the previous simulations and experiments. The fluidic inserts are used to alter the flow field to achieve the same effect of hard wall corrugations, which have been shown to reduce noise levels. The numerical simulations are used to help understand the effects on the flow field created by the fluidic inserts and to attempt to find flow parameters that can be correlated to noise reduction. Simulations were first run on a simpler geometry to give an understanding of the fluidic inserts. They were conducted by having three injectors exhausting into a supersonic boundary layer. The freestream Mach number was 1.5 to simulate the inside of the nozzle. A study was then conducted to see the effect of a change in downstream injector angle on the fluidic insert. There was also a study of an increase Reynolds number as three different sized nozzles were modeled. The first size is a small nozzle with an exit diameter of 0.885 inches. The nozzle size was then increased by a factor of 1.2 to an exit diameter of 1.06 inches. A third nozzle was then modeled to recreate the nozzle used in the GE experiments. This nozzle had a diameter of 5.07 inches. The results from all the simulations were then compared to experimental acoustic data. Flow parameters were then integrated from each simulation to attempt to find a correlation to noise reduction. Parameters such as streamwise vorticity, turbulent kinetic energy, and Q criterion were all analyzed.

Subjects/Keywords: CFD; computational fluid dynamics; converging; diverging; nozzle; aeroacoustics; noise reduction

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lampenfield, J. J. (2016). Simulations of the flow generated by fluidic inserts in a converging diverging nozzle. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/29170

Chicago Manual of Style (16^th Edition):

Lampenfield, Jacob John. “Simulations of the flow generated by fluidic inserts in a converging diverging nozzle.” 2016. Masters Thesis, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/29170.

MLA Handbook (7^th Edition):

Lampenfield, Jacob John. “Simulations of the flow generated by fluidic inserts in a converging diverging nozzle.” 2016. Web. 22 Feb 2020.

Vancouver:

Lampenfield JJ. Simulations of the flow generated by fluidic inserts in a converging diverging nozzle. [Internet] [Masters thesis]. Penn State University; 2016. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/29170.

Council of Science Editors:

Lampenfield JJ. Simulations of the flow generated by fluidic inserts in a converging diverging nozzle. [Masters Thesis]. Penn State University; 2016. Available from: https://etda.libraries.psu.edu/catalog/29170

Penn State University

29. Lawson, Michael J. A FUNDAMENTAL STUDY OF THE AIRFLOW AND ODORANT TRANSPORT PHENOMENA OF CANINE OLFACTION.

Degree: PhD, Mechanical Engineering, 2010, Penn State University

URL: https://etda.libraries.psu.edu/catalog/11310

► Olfaction begins when an animal draws odorant-laden air into its nasal cavity by sniffing, thus transporting odorant molecules from the external environment to olfactory receptor… (more)

▼ Olfaction begins when an animal draws odorant-laden air into its nasal cavity by sniffing, thus transporting odorant molecules from the external environment to olfactory receptor neurons (ORNs) in the sensory region of the nose. The dog and other macrosmatic (keen-scented) mammals have evolved a complex nasal anatomy that facilitates the efficient aerodynamic sampling of inspired odorant molecules. Here, airflow and odorant transport patterns in the canine nasal cavity are studied through a set of flow visualization experiments and computational fluid dynamics (CFD) simulations. An anatomically-correct experimental model of the canine nasal cavity, based on high-resolution magnetic resonance imaging scans, was designed and fabricated using a rapid prototyping technique. Dye-injection flow visualization experiments were performed using this model to characterize the canine's internal nasal airflow patterns. The results from these experiments illustrated the complex three dimensional flow patterns throughout the nasal cavity. The experimental results also confirmed the existence of distinct olfactory and respiratory airflow paths and were used to study the transition between laminar and turbulent flow domains. Moreover, these experiments were used to both qualitatively and quantitatively validate previous and current CFD simulations of canine nasal airflow. Steady and unsteady CFD simulations of odorant transport and deposition in the nasal cavity were performed. The simulations modeled the transport of odorant from the external environment, through the nasal airways, across the olfactory mucus layer, and to ORNs sites. Steady simulations were performed to study the relationship between odorant solubility and odorant deposition patterns (i.e. odorant flux patterns) across the canine's olfactory region. Highly-soluble odorants were deposited mainly along the entrance to the olfactory region. Moderately-soluble and insoluble odorant fluxes to the olfactory epithelium are significantly lower than those for highly-soluble odorants. However, these less soluble odorants are deposited more uniformly across the olfactory epithelium. The canine's nose apparently utilizes odorant absorption over a large surface area to compensate for the lower absorption rate of insoluble odorants. Physiologically-realistic sniffing was simulated to examine the effects of unsteady airflow on odorant transport. The unsteady simulations showed that the airflow is unidirectional in the olfactory region during inspiration and stagnant on expiration. Unsteady odorant transport patterns for highly-soluble and moderately soluble odorants were observed to become temporally fully-developed after a single sniff. Accordingly, the steady and unsteady odorant deposition patterns are qualitatively similar for these odorants. Insoluble odorant transport and deposition patterns however continue to develop over the course of many sniff cycles. This work shows that the canine has evolved a complex nasal anatomy that creates odorant-specific deposition patterns.…

Subjects/Keywords: computational fluid dynamics (CFD); flow visualization; canine olfaction

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lawson, M. J. (2010). A FUNDAMENTAL STUDY OF THE AIRFLOW AND ODORANT TRANSPORT PHENOMENA OF CANINE OLFACTION. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11310

Chicago Manual of Style (16^th Edition):

Lawson, Michael J. “A FUNDAMENTAL STUDY OF THE AIRFLOW AND ODORANT TRANSPORT PHENOMENA OF CANINE OLFACTION.” 2010. Doctoral Dissertation, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/11310.

MLA Handbook (7^th Edition):

Lawson, Michael J. “A FUNDAMENTAL STUDY OF THE AIRFLOW AND ODORANT TRANSPORT PHENOMENA OF CANINE OLFACTION.” 2010. Web. 22 Feb 2020.

Vancouver:

Lawson MJ. A FUNDAMENTAL STUDY OF THE AIRFLOW AND ODORANT TRANSPORT PHENOMENA OF CANINE OLFACTION. [Internet] [Doctoral dissertation]. Penn State University; 2010. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/11310.

Council of Science Editors:

Lawson MJ. A FUNDAMENTAL STUDY OF THE AIRFLOW AND ODORANT TRANSPORT PHENOMENA OF CANINE OLFACTION. [Doctoral Dissertation]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/11310

Penn State University

30. Porzio, David Philip. MICRO-THROUGH-MACROSCALE FLUID-DYNAMICS MODELING OF HUMAN RESPIRATION.

Degree: MS, Bioengineering, 2011, Penn State University

URL: https://etda.libraries.psu.edu/catalog/11543

► This research contributes several elements to an existing and evolving multi-scale model of human respiration. This model takes patient’s medical scans (CT) and extracts the… (more)

▼ This research contributes several elements to an existing and evolving multi-scale model of human respiration. This model takes patient’s medical scans (CT) and extracts the airways into a surface geometry file and associated skeletonized data file. A semi-automated geometry algorithm truncates the airways and gives them generational assignments along with planar pressure boundaries at their desired outlets. A volume mesh is then generated from the surface mesh that can be used for respiration simulation. The planar pressure boundaries interact with a second mesh comprised of automatically generated Quasi-1D pipes representing the lower airways which saves considerable amounts of computational time. This research improved on several of these modeling components. New algorithms were developed, coded, and verified for truncation and generational assignment that are dependent on a separate attribute algorithm, which works in conjunction to replace the previous geometry tool. Also, new automated software tools were developed to create idealized CAD models and meshes for computational simulation to calculate the losses in sub-grid scale bifurcation regions that connect the Quasi-1D pipes in the lower airways. The truncation algorithms were shown to be more robust than their predecessor when dealing with very complex medical imagery; likewise, the associated generational assignment algorithm was shown to have increased accuracy when compared to the previous version. However, mixed success was obtained from the development of loss models for the sub-grid scale bifurcation regions. Computational simulations gave consistent values for the loss associated with these geometries and demonstrated that the flow and subsequent loss in the lower airways is dominated by viscous effects. Unfortunately as these losses were orders of magnitude smaller than the head loss in such flows, the inherent slight variations from mesh to mesh that arises when changing a feature for comparison are enough to obscure the trends from being properly resolved.

Subjects/Keywords: computational fluid dynamics; cfd; multiscale; human respiration; macroscale; breathing; microscale

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Porzio, D. P. (2011). MICRO-THROUGH-MACROSCALE FLUID-DYNAMICS MODELING OF HUMAN RESPIRATION. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11543

Chicago Manual of Style (16^th Edition):

Porzio, David Philip. “MICRO-THROUGH-MACROSCALE FLUID-DYNAMICS MODELING OF HUMAN RESPIRATION.” 2011. Masters Thesis, Penn State University. Accessed February 22, 2020. https://etda.libraries.psu.edu/catalog/11543.

MLA Handbook (7^th Edition):

Porzio, David Philip. “MICRO-THROUGH-MACROSCALE FLUID-DYNAMICS MODELING OF HUMAN RESPIRATION.” 2011. Web. 22 Feb 2020.

Vancouver:

Porzio DP. MICRO-THROUGH-MACROSCALE FLUID-DYNAMICS MODELING OF HUMAN RESPIRATION. [Internet] [Masters thesis]. Penn State University; 2011. [cited 2020 Feb 22]. Available from: https://etda.libraries.psu.edu/catalog/11543.

Council of Science Editors:

Porzio DP. MICRO-THROUGH-MACROSCALE FLUID-DYNAMICS MODELING OF HUMAN RESPIRATION. [Masters Thesis]. Penn State University; 2011. Available from: https://etda.libraries.psu.edu/catalog/11543

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