subject:(Volume of fluid VOF )

1. Van der Neut, E.M. (author). Analysis of the notional permeability of rubble mound breakwaters by means of a VOF model.

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:44ece14d-e307-424a-8f55-08d756c743b3

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When designing a rubble mound breakwater, one would like to predict the stability of the armour layer of the breakwater. For this purpose several armour… (more)

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When designing a rubble mound breakwater, one would like to predict the stability of the armour layer of the breakwater. For this purpose several armour layer stability formula are developed. The most reliable is considered to be the stability formula of Van der Meer (1988). With this method, the armour layer stability is predicted based on several parameters. One of these parameters is the so-called notional permeability, P. The definition of the word notional is important to keep in mind; existing as or based on a suggestion, estimate, or theory; not existing in reality. Or, in other words, the notional permeability is not a physical description of the real permeability of a breakwater. Furthermore, there are no methods to calculate the notional permeability. This makes it difficult to estimate a safe and reliable P-value for an arbitrary structure. The definition of the notional permeability suggests that a single P-value can be attributed to a structure. However, previous research has suggested that the notional permeability is not only dependent on structural parameters, but also on hydraulic parameters. This makes the assumption of a single P-value for a particular structure under arbitrary hydraulic conditions invalid. The P-value should therefore vary under varying hydraulic conditions. This thesis aims for a better understanding of the physical processes the notional permeability. Some of the original physical model tests of Van der Meer (1988) are selected for analysis to achieve this goal. As a tool the numerical model IH2VOF is used. This 2D vertical model is able to simulate flow interaction with porous media. And makes it possible to measure pressures and flow velocities at any point within a breakwater. In this way physical processes can be described as functions of pressures and flow velocities. The model is able to simulate porous flows by Volume Averaging the Reynolds Averaged Navier Stokes equations. This Volume Averaging introduces a porosity into the equations. Furthermore, the extended Forchheimer equation is needed to close the equations. This additionally introduces the laminar and turbulent Forchheimer coefficients and added mass coefficients to the equations. These four variables describe the porous media and are required as input to the model. Based on a literature study a hypothesis is made about the variables on which the notional permeability is dependent. The Buckingham PI theorem is applied to these variables, resulting in four dimensionless PI terms. Eventually it is concluded that the PI terms are best measured 0.5 times the significant wave height below the initial water level, inside the armour layer and in a normal direction to the front slope of the structure. With this approach, all four PI terms show a positive correlation with P.

Hydraulic Engineering

Civil Engineering and Geosciences

Advisors/Committee Members: Uijttewaal, W.S.J. (mentor), Verhagen, H.J. (mentor), Van den Bos, J.P. (mentor).

Subjects/Keywords: Volume-of-Fluid (VOF); breakwaters; notional permeability; porous media

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APA (6^th Edition):

Van der Neut, E. M. (. (2015). Analysis of the notional permeability of rubble mound breakwaters by means of a VOF model. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:44ece14d-e307-424a-8f55-08d756c743b3

Chicago Manual of Style (16^th Edition):

Van der Neut, E M (author). “Analysis of the notional permeability of rubble mound breakwaters by means of a VOF model.” 2015. Masters Thesis, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:44ece14d-e307-424a-8f55-08d756c743b3.

MLA Handbook (7^th Edition):

Van der Neut, E M (author). “Analysis of the notional permeability of rubble mound breakwaters by means of a VOF model.” 2015. Web. 18 Jan 2021.

Vancouver:

Van der Neut EM(. Analysis of the notional permeability of rubble mound breakwaters by means of a VOF model. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:44ece14d-e307-424a-8f55-08d756c743b3.

Council of Science Editors:

Van der Neut EM(. Analysis of the notional permeability of rubble mound breakwaters by means of a VOF model. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:44ece14d-e307-424a-8f55-08d756c743b3

University of Oulu

2. Ramasetti, E. K. (Eshwar Kumar). Modelling of open-eye formation and mixing phenomena in a gas-stirred ladle for different operating parameters.

Degree: 2019, University of Oulu

URL: http://urn.fi/urn:isbn:9789526223568

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Abstract In ladle metallurgy, gas stirring and the behaviour of the slag layer are very important for alloying and the homogenization of the steel. When… (more)

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Abstract In ladle metallurgy, gas stirring and the behaviour of the slag layer are very important for alloying and the homogenization of the steel. When gas is injected through a nozzle located at the bottom of the ladle into the metal bath, the gas jet exiting the nozzle breaks up into gas bubbles. The rising bubbles break the slag layer and create an open-eye. The size of the open-eye is very important as the efficiency of the metal-slag reactions depend on the interaction between the slag and steel created during the stirring process, and information about the position and size of the open-eye is important for effective alloying practice. Moreover, the open-eye has an effect on the energy balance since it increases heat losses. In this study, experimental measurements and numerical simulations were performed to study the effect of different operating parameters on the formation of the open-eye and mixing time in a water model and industrial ladle. Experimental measurements were performed to study the effect of the gas flow rate, slag layer thickness, slag layer densities and number of porous plugs in a 1/5 scale water model and in a 150-ton steelmaking ladle. For numerical modelling, a multi-phase volume of fluid (VOF) model was used to simulate the system including the behaviour of the slag layer. The numerical simulation of the open-eye size and mixing time was found to be in good agreement with the experimental data obtained from the water model and data obtained from the industrial measurements.

Tiivistelmä Senkkametallurgiassa kaasuhuuhtelu ja kuonakerroksen käyttäytyminen ovat tärkeitä teräksen seostamisen ja homogenisoinnin näkökulmasta. Senkan pohjalla sijaitsevasta suuttimesta puhallettava kaasu hajoaa kupliksi, jotka rikkovat kuonakerroksen ja muodostavat avoimen silmäkkeen. Avoimen silmäkkeen koko on yhteydessä voimakkaampaan kuonan emulgoitumiseen, joka tehostaa metallisulan ja kuonan välisiä reaktioita. Tietoa avoimen silmäkkeen paikasta ja koosta tarvitaan myös tehokkaaseen seostuspraktiikkaan. Avoin silmäke vaikuttaa lisäksi prosessin energiataseeseen lisäten sen lämpöhäviöitä. Tässä tutkimuksessa tutkittiin kokeellisesti ja laskennallisesti erilaisten operointiparametrien vaikutusta avoimen silmäkkeen muodostumiseen vesimallissa ja terässenkassateollisessa senkassa. Kokeellisia mittauksia tehtiin kaasuhuuhtelun, kuonakerroksen paksuuden, ja suuttimien määrän vaikutuksen tutkimiseksi 1/5-mittakaavan vesimallissa ja 150 tonnin terässenkassa. Numeerisessa mallinnuksessa systeemin ja siihen lukeutuvan kuonakerroksen käyttäytymisen simuloimiseen käytettiin volume of fluid (VOF) –monifaasimenetelmää. Avoimen silmäkkeen kokoon ja sekoittumisaikaan liittyvien numeeristen simulointien havaittiin vastaavan hyvin vesimallista ja teollisista mittauksista saatua kokeellista aineistoa.

Advisors/Committee Members: Fabritius, T. (Timo), Sulasalmi, P. (Petri), Visuri, V. (Ville-Valtteri).

Subjects/Keywords: computational fluid dynamics (CFD); ladle stirring; open-eye; slag layer; volume of fluid (VOF) model; avoin silmäke; kuonakerros; laskennallinen virtausdynamiikka (CFD); sekundäärimetallurgia; volume of fluid (VOF) -malli

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

APA (6^th Edition):

Ramasetti, E. K. (. K. (2019). Modelling of open-eye formation and mixing phenomena in a gas-stirred ladle for different operating parameters. (Doctoral Dissertation). University of Oulu. Retrieved from http://urn.fi/urn:isbn:9789526223568

Chicago Manual of Style (16^th Edition):

Ramasetti, E K (Eshwar Kumar). “Modelling of open-eye formation and mixing phenomena in a gas-stirred ladle for different operating parameters.” 2019. Doctoral Dissertation, University of Oulu. Accessed January 18, 2021. http://urn.fi/urn:isbn:9789526223568.

MLA Handbook (7^th Edition):

Ramasetti, E K (Eshwar Kumar). “Modelling of open-eye formation and mixing phenomena in a gas-stirred ladle for different operating parameters.” 2019. Web. 18 Jan 2021.

Vancouver:

Ramasetti EK(K. Modelling of open-eye formation and mixing phenomena in a gas-stirred ladle for different operating parameters. [Internet] [Doctoral dissertation]. University of Oulu; 2019. [cited 2021 Jan 18]. Available from: http://urn.fi/urn:isbn:9789526223568.

Council of Science Editors:

Ramasetti EK(K. Modelling of open-eye formation and mixing phenomena in a gas-stirred ladle for different operating parameters. [Doctoral Dissertation]. University of Oulu; 2019. Available from: http://urn.fi/urn:isbn:9789526223568

Virginia Tech

3. Drumright-Clarke, Mary Ann. Numerical simulations that characterize the effects of surfactant on droplets in shear flow.

Degree: PhD, Mathematics, 2002, Virginia Tech

URL: http://hdl.handle.net/10919/26895

► Numerical simulations utilizing the code SURFER++ with the incorporation of an insoluble surfactant in the VOF scheme were conducted to characterize the effects of surfactant… (more)

Subjects/Keywords: surfactant; VOF; reduction; Volume of Fluid

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

APA (6^th Edition):

Drumright-Clarke, M. A. (2002). Numerical simulations that characterize the effects of surfactant on droplets in shear flow. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/26895

Chicago Manual of Style (16^th Edition):

Drumright-Clarke, Mary Ann. “Numerical simulations that characterize the effects of surfactant on droplets in shear flow.” 2002. Doctoral Dissertation, Virginia Tech. Accessed January 18, 2021. http://hdl.handle.net/10919/26895.

MLA Handbook (7^th Edition):

Drumright-Clarke, Mary Ann. “Numerical simulations that characterize the effects of surfactant on droplets in shear flow.” 2002. Web. 18 Jan 2021.

Vancouver:

Drumright-Clarke MA. Numerical simulations that characterize the effects of surfactant on droplets in shear flow. [Internet] [Doctoral dissertation]. Virginia Tech; 2002. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10919/26895.

Council of Science Editors:

Drumright-Clarke MA. Numerical simulations that characterize the effects of surfactant on droplets in shear flow. [Doctoral Dissertation]. Virginia Tech; 2002. Available from: http://hdl.handle.net/10919/26895

University of New South Wales

4. Soh, Gim. A CFD model for the coupling of multiphase, multicomponent and mass transfer physics for micro-scale simulations.

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

URL: http://handle.unsw.edu.au/1959.4/60199 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51295/SOURCE2?view=true

► Fluid flow in the real world occurs with multiple physics interacting with one anothersimultaneously. Accurate simulations of fluid flow will therefore require the incorporation ofthe… (more)

▼ Fluid flow in the real world occurs with multiple physics interacting with one anothersimultaneously. Accurate simulations of fluid flow will therefore require the incorporation ofthe various physics for realistic simulations. In this work a holistic computational fluiddynamics (CFD) model that couples the physics of multiphase flow, multicomponent flowand mass transfer physics across the multiphase interface is presented. The CFD model usesthe volume-of-fluid (VOF) multiphase model as its foundation, and is applicable for microscale simulations, whilst being able to handle complex interfacial movements with masstransfer occurring simultaneously.The model development entails three main stages. Firstly the issue of spurious velocities formultiphase simulations at the micro-scale had to be addressed. A series of smoothingoperations were adopted for parameters used to calculate the surface tension force, whichsmooths out any numerical errors across surrounding grid cells, thus minimising its impact incausing spurious velocities.Secondly, the multiphase interfacial area used to determine mass transfer requires accuratecalculation, as opposed to using the standard |∇α| function which has its limitations. Analgorithm was developed which approximates the interfacial area as a plane cutting theorthogonal mesh cell, with the orientation and position of the plane cut determined from theinterface normal 𝐧 and the volume fraction α.Thirdly, the multicomponent physics had to be coupled to the VOF multiphase model with the incorporation of an appropriate mass transfer model. The species transport equation wasemployed for multicomponent tracking, and the α-factor and expulsion operations were added to ensure the species are tracked within the correct phase. Two mass transfer models found in literature were also adopted with some modifications to the original models to improve their performance.In each of the three stages of the CFD model development, test cases were conducted andtheir results compared to theoretical results and literature experimental data. Comparison ofthe results showed agreement which attests to the functionality and accuracy for each stage ofthe model developed. With the full coupled multiphase-multicomponent model developed, anumerical investigation was conducted into the formation and dissolution of CO2 bubbleswithin silicone oil in a cross junction microchannel, which obtained numerous insights intothe multiphase dissolution physics occurring at the micro scale. Advisors/Committee Members: Yeoh, Guan, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW, Timchenko, Victoria, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW.

Subjects/Keywords: Multiphase and multicomponent coupling; Volume-of-fluid (VOF); Multiphase flow; Mass transfer; Micro-scale

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

APA (6^th Edition):

Soh, G. (2018). A CFD model for the coupling of multiphase, multicomponent and mass transfer physics for micro-scale simulations. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/60199 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51295/SOURCE2?view=true

Chicago Manual of Style (16^th Edition):

Soh, Gim. “A CFD model for the coupling of multiphase, multicomponent and mass transfer physics for micro-scale simulations.” 2018. Doctoral Dissertation, University of New South Wales. Accessed January 18, 2021. http://handle.unsw.edu.au/1959.4/60199 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51295/SOURCE2?view=true.

MLA Handbook (7^th Edition):

Soh, Gim. “A CFD model for the coupling of multiphase, multicomponent and mass transfer physics for micro-scale simulations.” 2018. Web. 18 Jan 2021.

Vancouver:

Soh G. A CFD model for the coupling of multiphase, multicomponent and mass transfer physics for micro-scale simulations. [Internet] [Doctoral dissertation]. University of New South Wales; 2018. [cited 2021 Jan 18]. Available from: http://handle.unsw.edu.au/1959.4/60199 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51295/SOURCE2?view=true.

Council of Science Editors:

Soh G. A CFD model for the coupling of multiphase, multicomponent and mass transfer physics for micro-scale simulations. [Doctoral Dissertation]. University of New South Wales; 2018. Available from: http://handle.unsw.edu.au/1959.4/60199 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:51295/SOURCE2?view=true

University of Alabama

5. Cossey, Aaron Mitchell. Computational fluid dynamic analysis of the purification process of the neutrino detector KamLAND.

Degree: 2009, University of Alabama

URL: http://purl.lib.ua.edu/118

► A simplified two-dimensional finite volume axisymmetric mesh was constructed that represented the geometry of the Kamioka Liquid scintillator Anti-Neutrino Detector (KamLAND) experiment in order to… (more)

Subjects/Keywords: Electronic Thesis or Dissertation; – thesis; Engineering, Mechanical; CFD; computational fluid dynamics; natural convection; stratification; VOF; volume of fluid

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

APA (6^th Edition):

Cossey, A. M. (2009). Computational fluid dynamic analysis of the purification process of the neutrino detector KamLAND. (Thesis). University of Alabama. Retrieved from http://purl.lib.ua.edu/118

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):

Cossey, Aaron Mitchell. “Computational fluid dynamic analysis of the purification process of the neutrino detector KamLAND.” 2009. Thesis, University of Alabama. Accessed January 18, 2021. http://purl.lib.ua.edu/118.

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

MLA Handbook (7^th Edition):

Cossey, Aaron Mitchell. “Computational fluid dynamic analysis of the purification process of the neutrino detector KamLAND.” 2009. Web. 18 Jan 2021.

Vancouver:

Cossey AM. Computational fluid dynamic analysis of the purification process of the neutrino detector KamLAND. [Internet] [Thesis]. University of Alabama; 2009. [cited 2021 Jan 18]. Available from: http://purl.lib.ua.edu/118.

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

Council of Science Editors:

Cossey AM. Computational fluid dynamic analysis of the purification process of the neutrino detector KamLAND. [Thesis]. University of Alabama; 2009. Available from: http://purl.lib.ua.edu/118

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

6. Gunnesby, Michael. On Flow Predictions in Fuel Filler Pipe Design - Physical Testing vs Computational Fluid Dynamics.

Degree: The Institute of Technology, 2015, Linköping UniversityLinköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117534

► The development of a fuel filler pipe is based solely on experience and physical experiment. The challenge lies in designing the pipe to fulfill… (more)

▼ The development of a fuel filler pipe is based solely on experience and physical experiment. The challenge lies in designing the pipe to fulfill the customer needs. In other words designing the pipe such as the fuel flow does not splash back on the fuel dispenser causing a premature shut off. To improve this “trial-and-error” based development a computational fluid dynamics (CFD) model of the refueling process is investigated. In this thesis a CFD model has been developed that can predict the fuel flow in the filler pipe. Worst case scenario of the refueling process is during the first second when the tank is partially filled. The most critical fluid is diesel due to the commercially high volume flow of 55 l/min. Due to limitations of computational resources the simulations are focused on the first second of the refueling process. The challenge in this project is creating a CFD model that is time efficient, thus require the least amount of computational resources necessary to provide useful information. A multiphase model is required to simulate the refueling process. In this project the implicit volume of fluid (VOF) has been used which has previously proven to be a suitable choice for refueling simulations. The project is divided into two parts. Part one starts with experiments and simulations of a simplified fuel system with water as acting liquid with a Reynolds number of 90 000. A short comparison between three different turbulence models has been investigated (LES, DES and URANS) where the most promising turbulence model is URANS, specifically the SST k-ω model. A sensitivity analysis was performed on the chosen turbulence model. Between the chosen mesh and the densest mesh the difference of streamwise velocity in the boundary layer was 2.6 %. The chosen mesh with 1.9 M cells and a time step of 1e-4 s was found to be the best correlating model with respect to the experiments. In part two a real fuel filling system was investigated both with experiments and simulations with the same computational model as the chosen one from part one. The change of fluid and geometry resulted in a lower Reynolds number of 12 000. Two different versions of the fuel system was investigated; with a bypass pipe and without a bypass pipe. Because of a larger volumetric region the resulting mesh had 3.7 M cells. The finished model takes about 230 h on a local workstation with 11 cores. On a cluster with 200 cores the same simulation takes 30 h. The resulting model suffered from interpolation errors at the inlet which resulted in a volume flow of 50 l/min as opposed to 55 l/min in the experiments. Despite the difference the model could capture the key flow characteristics. With the developed model a new filler pipe can be easily implemented and provide results in shorter time than a prototype filler pipe can be ordered. This will increase the chances of ordering one single prototype that fulfills all requirements. While the simulation model cannot completely replace verification by experiments it…

Subjects/Keywords: Fuel filler pipe; CFD; computational fluid dynamics; VOF; volume of fluid; Volvo; multiphase; refueling; spitback; splashback

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

APA (6^th Edition):

Gunnesby, M. (2015). On Flow Predictions in Fuel Filler Pipe Design - Physical Testing vs Computational Fluid Dynamics. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117534

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):

Gunnesby, Michael. “On Flow Predictions in Fuel Filler Pipe Design - Physical Testing vs Computational Fluid Dynamics.” 2015. Thesis, Linköping UniversityLinköping University. Accessed January 18, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117534.

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

MLA Handbook (7^th Edition):

Gunnesby, Michael. “On Flow Predictions in Fuel Filler Pipe Design - Physical Testing vs Computational Fluid Dynamics.” 2015. Web. 18 Jan 2021.

Vancouver:

Gunnesby M. On Flow Predictions in Fuel Filler Pipe Design - Physical Testing vs Computational Fluid Dynamics. [Internet] [Thesis]. Linköping UniversityLinköping University; 2015. [cited 2021 Jan 18]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117534.

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

Council of Science Editors:

Gunnesby M. On Flow Predictions in Fuel Filler Pipe Design - Physical Testing vs Computational Fluid Dynamics. [Thesis]. Linköping UniversityLinköping University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117534

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

7. VANKY, PATRICIA. Implementation of Dynamic Contact Angle for Multiphase Simulation of Rain Film Contamination on 5G-Radomes .

Degree: Chalmers tekniska högskola / Institutionen för mekanik och maritima vetenskaper, 2020, Chalmers University of Technology

URL: http://hdl.handle.net/20.500.12380/301605

► The aim of this thesis is to simulate the behaviour of water films created by precipitation on 5G-radomes. This is done to predict the reduction… (more)

▼ The aim of this thesis is to simulate the behaviour of water films created by precipitation on 5G-radomes. This is done to predict the reduction of transmission and receiving range as a product of the water absorbing the high frequency microwaves. To describe the proper behaviour of rain droplet spread and water films, impingement onto a variation of surfaces is simulated in the commercial software ANSYS Fluent and validated against experimental data. Simulations are conducted using a direct numerical simulation method for multiphase flow, Volume of Fluid, VoF, and the surface tension is modelled using the continuum surface force method. The contact angle is implemented as boundary conditions for the continuum surface force method at the contact line between the two phases and the wall. For this thesis, a dynamic contact angle model is implemented as a user defined function. Whether the liquid spread is advancing or receding is then determined by the contact line velocity direction as well as the volume fraction gradient direction. Implemented dynamic contact angle models are validated with separate convergence studies for simulation of water droplet impingement onto a variation of hydrophobic surfaces in addition to the validation against experimental data. Additionally, the effects of implementing a Navier-slip boundary condition, relaxing the no-slip boundary was evaluated. Furthermore, the dynamic contact angle model is tried for simulation of water films. The implementation of the dynamic contact angle gives simulated results that closely match the behaviour shown in experiments of droplet impingement for most cases tested. However, the simulations of high Weber number impacts onto a hydrophobic surface result in a splashing effect not seen in experiments. Also, the hydrophilic surfaces used in the experiments have such low contact angles that resolving the curvatures gives instabilities. The results for hydrophilic surfaces are therefore not optimal to consider. It was also found that the results are dependent on the mesh, especially the boundary layer treatment. Using a polyhedral mesh with 5 prism layers resulted in good results whereas other refinement approaches need more work. Water film simulations were conducted as a proof-of-concept to test the implemented dynamic contact angle models on complex domains with sharp transitions and variations of hydrophobicity. It was shown that the models can handle water over these complex areas and they are therefore ready to be used when methods for properly injecting full scale rain onto the surface are developed.

Subjects/Keywords: Wettability; Dynamic Contact Angle; Droplet Impingement; Surface Tension; ANSYS Fluent; Computational Fluid Dynamics; CFD; Multiphase Flow; Volume of Fluid; VoF

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

APA (6^th Edition):

VANKY, P. (2020). Implementation of Dynamic Contact Angle for Multiphase Simulation of Rain Film Contamination on 5G-Radomes . (Thesis). Chalmers University of Technology. Retrieved from http://hdl.handle.net/20.500.12380/301605

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):

VANKY, PATRICIA. “Implementation of Dynamic Contact Angle for Multiphase Simulation of Rain Film Contamination on 5G-Radomes .” 2020. Thesis, Chalmers University of Technology. Accessed January 18, 2021. http://hdl.handle.net/20.500.12380/301605.

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

MLA Handbook (7^th Edition):

VANKY, PATRICIA. “Implementation of Dynamic Contact Angle for Multiphase Simulation of Rain Film Contamination on 5G-Radomes .” 2020. Web. 18 Jan 2021.

Vancouver:

VANKY P. Implementation of Dynamic Contact Angle for Multiphase Simulation of Rain Film Contamination on 5G-Radomes . [Internet] [Thesis]. Chalmers University of Technology; 2020. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/20.500.12380/301605.

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

Council of Science Editors:

VANKY P. Implementation of Dynamic Contact Angle for Multiphase Simulation of Rain Film Contamination on 5G-Radomes . [Thesis]. Chalmers University of Technology; 2020. Available from: http://hdl.handle.net/20.500.12380/301605

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

Luleå University of Technology

8. Engström, Per. Physical and numerical modeling of multiphase flows during Continuous Casting.

Degree: 2014, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51526

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The quality of Continuous Casting (CC) products are highly connected to the flow of the liquid metal and injected argon inside the mould. Therefore,… (more)

Subjects/Keywords: Technology; Teknik; continuous casting; cfd; vof; volume of fluid; dpm; discrete phase model; ccs-1; numerical simulations; experiments; steel; Bi-Sn

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APA (6^th Edition):

Engström, P. (2014). Physical and numerical modeling of multiphase flows during Continuous Casting. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51526

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):

Engström, Per. “Physical and numerical modeling of multiphase flows during Continuous Casting.” 2014. Thesis, Luleå University of Technology. Accessed January 18, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51526.

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

MLA Handbook (7^th Edition):

Engström, Per. “Physical and numerical modeling of multiphase flows during Continuous Casting.” 2014. Web. 18 Jan 2021.

Vancouver:

Engström P. Physical and numerical modeling of multiphase flows during Continuous Casting. [Internet] [Thesis]. Luleå University of Technology; 2014. [cited 2021 Jan 18]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51526.

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

Council of Science Editors:

Engström P. Physical and numerical modeling of multiphase flows during Continuous Casting. [Thesis]. Luleå University of Technology; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51526

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

Loughborough University

9. Alrahmani, Mosab. A numerical study on the effects of surface and geometry design on water behaviour in PEM fuel cell gas channels.

Degree: PhD, 2014, Loughborough University

URL: http://hdl.handle.net/2134/16245

► Water management is a serious issue that affects the performance and durability of PEM fuel cells. It is known, from previous experimental investigations, that surface… (more)

▼ Water management is a serious issue that affects the performance and durability of PEM fuel cells. It is known, from previous experimental investigations, that surface wettability has influence on water behaviour and fuel cell performance. This finding has lead researchers to develop numerical tools for further investigation of the liquid water behaviour in gas channels. The Volume-of-Fluid (VOF) method has been used in a wide range of studies for its advantage of showing the multi-phase interface in a Computational Fluid Dynamics (CFD) simulation to understand liquid water behaviour in gas channels. In this thesis, numerical study has been carried out to examine the behaviour of liquid water in gas channels. The dynamic movement of the liquid water in the channel and the associated pressure drop, water saturation and water coverage of the GDL have been investigated. Firstly, flow diffusion into the GDL was examined to determine its effect on liquid droplet behaviour in a small section of a gas channel. Furthermore, the effects of the percentage of flow diffusion, GDL wettability, pore size, and water inlet velocity were investigated. Fluid diffusion into GDL found to have insignificant impact on liquid water behaviour so further investigations has been carried with a solid GDL surface. Secondly, gas channel geometry effect on liquid water behaviour was studied. Square, semicircle, triangle, trapezoid with a long base and trapezoid with a short base were compared to find suitable cross section geometry to carry wall wettability investigations. Among the examined geometries, the square cross section showed reasonable results for both scenarios of geometry design, fixed Reynolds number and fixed GDL interface. The effect of wall wettability was assessed by comparing nine different wall/GDL wettability combinations for straight and bend channels. Wall wettability found to have an impact on liquid water behaviour but not as much as GDL wettability. It affects liquid water saturation in the channel by a great deal by accumulating water in the channel edges affecting water behaviour. This was also proven in the last test case of a long channel where water accumulation was investigated by running the calculation until the percentage of water saturation is stabilized. It is also concluded that changing wall wettability from hydrophobic to hydrophilic doubles the percentage of channel occupied by liquid water and increases the time to reach steady state.

Subjects/Keywords: 621.31; Volume-of-fluid (VOF); Wall wettability; Proton exchange membrane fuel cell; Two-phase flow; Gas channel

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APA (6^th Edition):

Alrahmani, M. (2014). A numerical study on the effects of surface and geometry design on water behaviour in PEM fuel cell gas channels. (Doctoral Dissertation). Loughborough University. Retrieved from http://hdl.handle.net/2134/16245

Chicago Manual of Style (16^th Edition):

Alrahmani, Mosab. “A numerical study on the effects of surface and geometry design on water behaviour in PEM fuel cell gas channels.” 2014. Doctoral Dissertation, Loughborough University. Accessed January 18, 2021. http://hdl.handle.net/2134/16245.

MLA Handbook (7^th Edition):

Alrahmani, Mosab. “A numerical study on the effects of surface and geometry design on water behaviour in PEM fuel cell gas channels.” 2014. Web. 18 Jan 2021.

Vancouver:

Alrahmani M. A numerical study on the effects of surface and geometry design on water behaviour in PEM fuel cell gas channels. [Internet] [Doctoral dissertation]. Loughborough University; 2014. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2134/16245.

Council of Science Editors:

Alrahmani M. A numerical study on the effects of surface and geometry design on water behaviour in PEM fuel cell gas channels. [Doctoral Dissertation]. Loughborough University; 2014. Available from: http://hdl.handle.net/2134/16245

Indian Institute of Science

10. Aatresh, K. Microgravity Flow Transients in the Context of On-Board Propellant Gauging.

Degree: PhD, Faculty of Engineering, 2018, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/2005/3105

► It is well known that surface tension of a liquid has a decisive role in flow dynamics and the eventual equilibrium state, especially in confined… (more)

▼ It is well known that surface tension of a liquid has a decisive role in flow dynamics and the eventual equilibrium state, especially in confined flows under low gravity conditions and also in free surface flows. One such instance of a combination of these two cases where surface tension plays an important role is in the microgravity environment of a spacecraft propellant tank. In this specific case both propellant acquisition and residual propellant estimation are critical to the mission objectives particularly in the end-of-life phase. While there have been a few studies pertaining to the equilibrium state in given geometric configurations, the transient flow leading to final state from an initial arbitrary distribution of propellant is rarely described. The present study is aimed at analysing the dynamic behaviour of the liquids under reduced gravity through numerical simulation and also addresses the specific case of propellant flow transient in a cone-in-a-sphere type of tank configuration proposed by Lal and Raghunandan which is likely to result in both improved acquisition and life time estimation of spacecraft. While addressing this specific problem, the present work aims to study the transient nature of such surface tension driven flows in a general form as applicable to other similar problems also. Volume of Fluid (VOF) method for multiphase model in ANSYS FLUENT was adapted with suitable changes for generating numerical solutions to this problem. Simulations were run for three different cone angles of 17o, 21o & 28o with a flat liquid surface for full scale models to measure the rise height and time of rise. Two scaled models of ½ and 1/10th of the original dimensions with the same liquid configuration of the 28o cone angle case were simulated to see if the time scales involved would come down for experimental feasibility. A third simulation of the 1/10th scale model was run with the liquid spread in the tank to imitate the general conditions found in the propellant tank in microgravity. To understand the behaviour of liquids in the microgravity state to changing physical parameters, a set of simulations was run using liquid phases as water and hydrazine with different physical parameters of temperature and surface tension. The theory put forward by Lal and Raghunandan was found to stand firm. In the case of the cone angle of 28o it was observed that in the final equilibrium state the liquid collected towards the apex of the cone with the larger volume fraction of liquid accumulating inside the cone. An addition of a cylindrical section at the bottom of the cone seems to help although not uniformly for all case. The equilibrium settling times for all the three cone angle cases were in the order of 300 to 600 seconds for simulations on a spherical tank of diameter two metres which was close to the actual tank dimension used on spacecraft. Scaled down simulations of 1/10th and ½ the tank geometry with both flat liquid surfaces and spread out liquid volumes showed that the smaller models had equilibrium… Advisors/Committee Members: Raghunandan, B N (advisor).

Subjects/Keywords: Spacecraft Propellant; Microgravity Flow Transients; Propellant Gauging; Volume Fraction Equation; Surface Tension Model; ANSYS FLUENT; Surface Tension; Volume of Fluid (VOF); Aerospace Engineering

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APA (6^th Edition):

Aatresh, K. (2018). Microgravity Flow Transients in the Context of On-Board Propellant Gauging. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3105

Chicago Manual of Style (16^th Edition):

Aatresh, K. “Microgravity Flow Transients in the Context of On-Board Propellant Gauging.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed January 18, 2021. http://etd.iisc.ac.in/handle/2005/3105.

MLA Handbook (7^th Edition):

Aatresh, K. “Microgravity Flow Transients in the Context of On-Board Propellant Gauging.” 2018. Web. 18 Jan 2021.

Vancouver:

Aatresh K. Microgravity Flow Transients in the Context of On-Board Propellant Gauging. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2021 Jan 18]. Available from: http://etd.iisc.ac.in/handle/2005/3105.

Council of Science Editors:

Aatresh K. Microgravity Flow Transients in the Context of On-Board Propellant Gauging. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3105

Curtin University of Technology

11. Ben Mahmud, Hisham. Multiphase Transient Flow in Pipes .

Degree: 2012, Curtin University of Technology

URL: http://hdl.handle.net/20.500.11937/1669

► The development of oil and gas fields in offshore deep waters (more than 1000 m) will become more common in the future. Inevitably, production systems… (more)

▼ The development of oil and gas fields in offshore deep waters (more than 1000 m) will become more common in the future. Inevitably, production systems will operate under multiphase flow conditions. The two–phase flow of gas–liquid in pipes with different inclinations has been studied intensively for many years. The reliable prediction of flow pattern, pressure drop, and liquid holdup in a two–phase flow is thereby important.With the increase of computer power and development of modelling software, the investigation of two–phase flows of gas–liquid problems using computational fluid dynamics (CFD) approaches is gradually becoming attractive in the various engineering disciplines. The use of CFD as a modelling tool in multiphase flow simulation has enormously increased in the last decades and is the focus of this thesis. Two basic CFD techniques are utilized to simulate the gas–liquid flow, the Volume of Fluid (VOF) model, and the Eulerian–Eulerian (E–E) model.The purpose of this thesis is to investigate the risk of hydrate formation in a low–spot flowline by assessing the flow pattern and droplet hydrodynamics in gas– dominated restarts using the VOF method, and also to develop and validate a model for gas–liquid two–phase flow in horizontal pipelines using the Eulerian– Eulerian method; the purpose of this is to predict the pressure drop and liquid holdup encountered during two–phase (i.e. gas–oil, gas–water) production at different flow conditions, such as fluid properties, volume fractions of liquid, superficial velocities, and mass fluxes.In the first part of this thesis, the VOF approach was used to simulate the droplet formation and flow pattern at various levels of liquid patched and restart gas superficial velocities. The effect of restart gas superficial velocity on the liquid displacement from the low section of the pipe showed a decrease in the remaining liquid with an increase in gas superficial velocity, and the amount of liquid depends on the fluid properties, such as density and viscosity. Moreover, the flow pattern is also strongly dependent on the restart gas superficial velocity as well as the patched liquid in the low section. A low gas superficial velocity with different patched liquids illustrated no risk of hydrate formation due to the observed flow pattern that is often a stratified flow. However, as the restart gas superficial velocity is increased, regardless of initial liquid patching, hydrate formation is more likely to be observed due to the observed flow pattern, such as annular, churn or dispersed flow.In the second part, the E–E model was employed to establish a computational model to predict the pressure drop and liquid holdup in a horizontal pipeline. Due to the complicated process phenomena of two–phase flow, a new drag coefficient was implemented to model the pressure drop and liquid holdup in the 3D pipe. Different simulations were performed with various superficial velocities of two–phase and liquid volume fractions, and were carried…

Subjects/Keywords: computational fluid dynamics; two-phase flow of gas-liquid; Eulerian–Eulerian E–E model; offshore deep waters; oil and gas fields; Volume of Fluid (VOF) model

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APA (6^th Edition):

Ben Mahmud, H. (2012). Multiphase Transient Flow in Pipes . (Thesis). Curtin University of Technology. Retrieved from http://hdl.handle.net/20.500.11937/1669

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):

Ben Mahmud, Hisham. “Multiphase Transient Flow in Pipes .” 2012. Thesis, Curtin University of Technology. Accessed January 18, 2021. http://hdl.handle.net/20.500.11937/1669.

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

MLA Handbook (7^th Edition):

Ben Mahmud, Hisham. “Multiphase Transient Flow in Pipes .” 2012. Web. 18 Jan 2021.

Vancouver:

Ben Mahmud H. Multiphase Transient Flow in Pipes . [Internet] [Thesis]. Curtin University of Technology; 2012. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/20.500.11937/1669.

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

Council of Science Editors:

Ben Mahmud H. Multiphase Transient Flow in Pipes . [Thesis]. Curtin University of Technology; 2012. Available from: http://hdl.handle.net/20.500.11937/1669

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

Missouri University of Science and Technology

12. Vusirikala, Shanti. CFD simulation of contact planarization.

Degree: M.S. in Chemical Engineering, Chemical Engineering, Missouri University of Science and Technology

URL: https://scholarsmine.mst.edu/masters_theses/4597

► "Semiconductor devices form the essential components of most electronic devices. The fabrication of circuit elements to manufacture these devices is done by a process known… (more)

Subjects/Keywords: Computational Fluid Dynamics (CFD); Volume of fluid (VOF) method; Chemical Engineering

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APA (6^th Edition):

Vusirikala, S. (n.d.). CFD simulation of contact planarization. (Masters Thesis). Missouri University of Science and Technology. Retrieved from https://scholarsmine.mst.edu/masters_theses/4597

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Chicago Manual of Style (16^th Edition):

Vusirikala, Shanti. “CFD simulation of contact planarization.” Masters Thesis, Missouri University of Science and Technology. Accessed January 18, 2021. https://scholarsmine.mst.edu/masters_theses/4597.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

MLA Handbook (7^th Edition):

Vusirikala, Shanti. “CFD simulation of contact planarization.” Web. 18 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Vusirikala S. CFD simulation of contact planarization. [Internet] [Masters thesis]. Missouri University of Science and Technology; [cited 2021 Jan 18]. Available from: https://scholarsmine.mst.edu/masters_theses/4597.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Council of Science Editors:

Vusirikala S. CFD simulation of contact planarization. [Masters Thesis]. Missouri University of Science and Technology; Available from: https://scholarsmine.mst.edu/masters_theses/4597

Note: this citation may be lacking information needed for this citation format:
No year of publication.

13. Brandely, Anaïs. Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale : Study of liquid sloshing in fuel tanks : numerical and experimental investigation.

Degree: Docteur es, Mécanique Avancée, 2016, Compiègne

URL: http://www.theses.fr/2016COMP2274

►

L’émergence de bruits auparavant inaudibles dans les réservoirs à carburants automobiles requiert des constructeurs une meilleure compréhension des phénomènes physiques intervenants au sein de leurs… (more)

▼

L’émergence de bruits auparavant inaudibles dans les réservoirs à carburants automobiles requiert des constructeurs une meilleure compréhension des phénomènes physiques intervenants au sein de leurs produits. Dans cette thèse, différents travaux ont été conduits autour de l’étude du ballottement de fluide dans une cuve rigide rectangulaire partiellement remplie de fluide et soumise à une excitation extérieure. La première partie présente un état de l’art sur le sloshing suivant trois approches complémentaires - approche analytique, approche numérique et approche expérimentale - permettant d’orienter les travaux. Dans une deuxième partie, une étude préliminaire sur le sloshing dans une cuve rectangulaire soumise à une excitation harmonique forcée est réalisée. La confrontation des résultats numériques entre une approche linéaire - basée sur la théorie d’écoulement potentiel tenant compte de la viscosité du fluide [Schotté et Ohayon, 2013] - et une approche non linéaire commerciale – basée sur la résolution des équations de Navier-Stokes - permet de définir un paramètre de linéarité. Ce dernier permet de déterminer les cas de sloshing qui nécessitent une résolution non linéaire et ceux pour lesquels la théorie linéaire suffit pour prédire le phénomène. La troisième partie de ce document présente une étude expérimentale du ballottement de fluide dans une cuve rectangulaire rigide soumise à un freinage automobile. Deux niveaux de remplissage créant deux types d’impacts contre les parois (avec et sans enfermement de poche d’air) ont été analysés. Les essais menés ont permis de mesurer les forces engendrées par le mouvement du fluide, les pressions d’impact en paroi ainsi que le champ de vitesse par méthode Particle Image Velocimetry (PIV). Ce chapitre constitue une importante base de données expérimentales ayant permis d’étudier précisément le phénomène physique. L’étude est complétée par une confrontation des résultats expérimentaux avec des résultats Computational Fluid Dynamics (CFD). Enfin, pour conclure ce mémoire, une étude du sloshing dans un réservoir en tenant compte de la Fluid-Structure Interaction (FSI) est présentée. Le choix du couplage a été porté sur un schéma partitionné itératif faible avec, dans un premier temps, une approche potentielle instationnaire, puis avec une approche Volume Of Fluid (VOF) pour la physique fluide. Les limites d’un tel couplage dans le cas d’étude d’un réservoir partiellement rempli de fluide et attaché de manière flexible en fonction du rapport de masse fluide-réservoir ont été mises en évidence. La correction du schéma de couplage par l’effet de masse ajoutée présentée dans [Song et al., 2013] permet la résolution d’un système couplé quel que soit le rapport de masse en jeu et améliore de manière significative la convergence en réduisant également fortement le temps de calcul.

The present thesis focuses on an investigation of the sloshing phenomenon in a partially filled fuel tank submitted to a harmonic excitation motion. In the first part, the confrontation of numerical…

Advisors/Committee Members: Lefrançois, Emmanuel (thesis director).

Subjects/Keywords: Surface libre; Formulation couplée; Réservoirs à carburant; Impact; Sloshing; Slamming; Volume Of Fluid (VOF); Computational Fluid Dynamics (CFD); Fluid dynamics; Navier-Stokes equations; Viscosity; Viscous flow; Fluid-structure interaction (FSI); Finite volume method; Acoustic; PIV

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

APA (6^th Edition):

Brandely, A. (2016). Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale : Study of liquid sloshing in fuel tanks : numerical and experimental investigation. (Doctoral Dissertation). Compiègne. Retrieved from http://www.theses.fr/2016COMP2274

Chicago Manual of Style (16^th Edition):

Brandely, Anaïs. “Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale : Study of liquid sloshing in fuel tanks : numerical and experimental investigation.” 2016. Doctoral Dissertation, Compiègne. Accessed January 18, 2021. http://www.theses.fr/2016COMP2274.

MLA Handbook (7^th Edition):

Brandely, Anaïs. “Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale : Study of liquid sloshing in fuel tanks : numerical and experimental investigation.” 2016. Web. 18 Jan 2021.

Vancouver:

Brandely A. Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale : Study of liquid sloshing in fuel tanks : numerical and experimental investigation. [Internet] [Doctoral dissertation]. Compiègne; 2016. [cited 2021 Jan 18]. Available from: http://www.theses.fr/2016COMP2274.

Council of Science Editors:

Brandely A. Étude du ballottement de fluide dans les réservoirs à carburant : approches numérique et expérimentale : Study of liquid sloshing in fuel tanks : numerical and experimental investigation. [Doctoral Dissertation]. Compiègne; 2016. Available from: http://www.theses.fr/2016COMP2274

University of Illinois – Urbana-Champaign

14. Jonayat, A.S.M. Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting.

Degree: MS, 0133, 2014, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/49686

► The behavior of the slag layer between the oscillating mold wall, the slag rim, the slag/liquid steel interface, and the solidifying steel shell, are of… (more)

Subjects/Keywords: Continuous casting; Computational model; Mold powder; Slag; Flux; Solidification; Consumption; Casting parameters; Over flow; Heat transfer; Multi-phase flow; Volume of fluid (VOF); interface

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APA (6^th Edition):

Jonayat, A. S. M. (2014). Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/49686

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):

Jonayat, A S M. “Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting.” 2014. Thesis, University of Illinois – Urbana-Champaign. Accessed January 18, 2021. http://hdl.handle.net/2142/49686.

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

MLA Handbook (7^th Edition):

Jonayat, A S M. “Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting.” 2014. Web. 18 Jan 2021.

Vancouver:

Jonayat ASM. Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2014. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2142/49686.

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

Council of Science Editors:

Jonayat ASM. Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting. [Thesis]. University of Illinois – Urbana-Champaign; 2014. Available from: http://hdl.handle.net/2142/49686

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

Delft University of Technology

15. Wellens, P.R. Wave Simulation in Truncated Domains for Offshore Applications.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421

► <Subject and main objective> There is a desire to assess extreme wave loads on offshore structures like Floating Production, Storage and Offloading (FPSO) vessels, either… (more)

▼ <Subject and main objective> There is a desire to assess extreme wave loads on offshore structures like Floating Production, Storage and Offloading (FPSO) vessels, either for design, or for evaluation when circumstances near the structure change. Design formulae for extreme wave loads are scarce and have limited validity for specific structures. Simplified theory, such as linear potential theory, which is often used for motion analysis of offshore structures, does not represent the hydrodynamics involved in a wave impact with sufficient accuracy. For this reason, extreme wave loads are often assessed in physical experiments at model scale. Extreme wave loads may also be simulated by means of detailed numerical modeling. ComFLOW is the name for a numerical method specifically developed for simulating wave impact events. Simulation of wave impacts on offshore structure with ComFLOW is the subject of this thesis. Simulations should represent wave interaction with the structure as if it were out at sea. For reasons of efficiency, the computational domain can not be much larger than the offshore structure it contains. Wave simulation in computational domains of limited size requires special measures to reduce spurious reflection of waves at the boundaries of the domain. The main objective of this thesis is to find or develop means to efficiently reduce spurious reflection from the boundaries in ComFLOW. <Numerical method> ComFLOW is based on the Navier-Stokes equations. For the derivation of the numerical method in ComFLOW, a finite volume discretization for Cartesian grids has been adopted. The discretization yields a skew-symmetric operator for the convective term and a symmetric operator for the viscous term in the momentum equation, resembling the symmetry properties of the analytical operators. Forward Euler time discretization is applied, in which the pressure term is evaluated implicitly. Substituting the discrete momentum equation in the discrete continuity equation gives a Poisson equation for the pressure which is solved iteratively by means of Successive Over-Relaxation (SOR) with an optimal choice for the relaxation coefficient in case the absorbing boundary condition derived in this thesis is not applied in the simulation. When the absorbing boundary condition is required, the Poisson equation (with additional terms resulting from the discretization of the absorbing boundary condition that do not fit the typical Poisson-stencil) is solved with a general sparse-matrix solver, in which the stabilized Bi-Conjugate Gradient (BiCGSTAB) iteration method is combined with an Incomplete Lower-Upper preconditioner (ILU(")). The free surface in ComFLOW is advected by means of an improved Volume of Fluid (iVOF) algorithm. The improvement consists of a local height function that aggregates fluid in a stencil of three cells in all spatial directions when fluxing fluid. The local height function reduces mass loss and so-called flotsam and jetsam, a numerical artifact consisting of disconnected droplets of fluid… Advisors/Committee Members: Huijsmans, R.H.M..

Subjects/Keywords: absorbing boundary conditions; numerical simulation; Navier-Stokes; Volume-of-Fluid (VOF)

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APA (6^th Edition):

Wellens, P. R. (2012). Wave Simulation in Truncated Domains for Offshore Applications. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421

Chicago Manual of Style (16^th Edition):

Wellens, P R. “Wave Simulation in Truncated Domains for Offshore Applications.” 2012. Doctoral Dissertation, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421.

MLA Handbook (7^th Edition):

Wellens, P R. “Wave Simulation in Truncated Domains for Offshore Applications.” 2012. Web. 18 Jan 2021.

Vancouver:

Wellens PR. Wave Simulation in Truncated Domains for Offshore Applications. [Internet] [Doctoral dissertation]. Delft University of Technology; 2012. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421.

Council of Science Editors:

Wellens PR. Wave Simulation in Truncated Domains for Offshore Applications. [Doctoral Dissertation]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; urn:NBN:nl:ui:24-uuid:d64907ac-4420-4026-b36d-95b4e24ef421 ; http://resolver.tudelft.nl/uuid:d64907ac-4420-4026-b36d-95b4e24ef421

New Jersey Institute of Technology

16. Akiti, Otute. Turbulent mixing and chemical reaction in baffled stirred tank reactors : a comparison between experiments and a novel micromixing-based computational fluid dynamics model.

Degree: PhD, Chemical Engineering, Chemistry and Environmental Science, 2000, New Jersey Institute of Technology

URL: https://digitalcommons.njit.edu/dissertations/420

► The optimization of reaction processes to maximize the yield of a desired product while minimizing the formation of undesired by-products is one of the… (more)

▼ The optimization of reaction processes to maximize the yield of a desired product while minimizing the formation of undesired by-products is one of the most important steps in process development for drug manufacturing or fine chemical production. In many situations the kinetics of product formation can be quite complex and involve a number of intermediate steps as well as parallel and serial reactions. This renders the systems sensitive to the operating conditions. Often, upon scale-up, a decrease in the yield of the desired product is experienced, while more undesired by-products are produced. A large number of interrelated variables influence the outcome of a process, and furthermore, most systems of process interest take place under turbulent conditions. Present methods for process design are inadequate because they involve the use of lumped parameters which fail to capture essential flow details and the rapid changes in the local concentration of reactants. In recent years Computational Fluid Dynamics (CFD) has been successfully used to model the fluid dynamics of complex vessels (such as agitated reactors) and to predict the velocity distribution in turbulent systems such as mixers and reactors. In this work a novel approach based on the use of CFD coupled with micromixing models was used to predict the behavior of a multiple, competitive reaction system in cylindrical stirred tank reactors fitted with a variety of agitators. In particular, the following fast parallel competing reactions scheme (Bourne and Yu 1994) was modeled, and the results compared with original experimental data: <center> NaOH (A) + HCl (B) – ^k1 – > NaCl(P) + H₂O NaOH(A) + CH₂ClCO₂C₂H₅(C) – ^k2 – > CH₂ClCO₂Na(Q) + C₂H₅0H(S) </center> The reactor was operated in semi-batch mode, with the limiting reagent (A) being slowly added to the contents of the reactor in which the other reagents (B and Q were already dissolved. The final yield of the undesired product (S) was experimentally measured. The flow field in the reactor was simulated using the Reynolds Stress (RSM) turbulence model. The full impeller geometry was incorporated in the CFD simulation using the Multiple Reference Frames (MRF) model. The reaction zone was modeled in a Lagrangian way using a multi-phase Volume of Fluid (VOF) model (Hirt and Nichols 198 1). The interaction of turbulence and reaction was accounted for by means of the engulfment-based models for micro-mixing (Baldyga and Bourne 1989a; Baldyga and Bourne 1989b; Baldyga et aL 1997). The agreement between experimental velocity distribution data and the results of the simulations was generally good. The micro-mixing models, in conjunction with CFD, predicted a final yield in close agreement with the experimental data, demonstrating that the proposed approach can be successfully used to model turbulent reactive systems without the need for experimental input. Advisors/Committee Members: Piero M. Armenante, Gordon Lewandowski, Robert Benedict Barat.

Subjects/Keywords: Reaction Processes; Computational Fluid Dynamics (CFD); Multi-Phase Volume Of Fluid (VOF) Model; Chemical Engineering

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

APA (6^th Edition):

Akiti, O. (2000). Turbulent mixing and chemical reaction in baffled stirred tank reactors : a comparison between experiments and a novel micromixing-based computational fluid dynamics model. (Doctoral Dissertation). New Jersey Institute of Technology. Retrieved from https://digitalcommons.njit.edu/dissertations/420

Chicago Manual of Style (16^th Edition):

Akiti, Otute. “Turbulent mixing and chemical reaction in baffled stirred tank reactors : a comparison between experiments and a novel micromixing-based computational fluid dynamics model.” 2000. Doctoral Dissertation, New Jersey Institute of Technology. Accessed January 18, 2021. https://digitalcommons.njit.edu/dissertations/420.

MLA Handbook (7^th Edition):

Akiti, Otute. “Turbulent mixing and chemical reaction in baffled stirred tank reactors : a comparison between experiments and a novel micromixing-based computational fluid dynamics model.” 2000. Web. 18 Jan 2021.

Vancouver:

Akiti O. Turbulent mixing and chemical reaction in baffled stirred tank reactors : a comparison between experiments and a novel micromixing-based computational fluid dynamics model. [Internet] [Doctoral dissertation]. New Jersey Institute of Technology; 2000. [cited 2021 Jan 18]. Available from: https://digitalcommons.njit.edu/dissertations/420.

Council of Science Editors:

Akiti O. Turbulent mixing and chemical reaction in baffled stirred tank reactors : a comparison between experiments and a novel micromixing-based computational fluid dynamics model. [Doctoral Dissertation]. New Jersey Institute of Technology; 2000. Available from: https://digitalcommons.njit.edu/dissertations/420

Delft University of Technology

17. Oud, G.T. A dual interface method in cylindrical coordinates for two-phase pipe flows.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; 33718e17-681f-4fb6-92ca-362f340fab45 ; 10.4233/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:isbn:978-94-6295-763-3 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45

► This research entails the numerical simulation of physical flow instabilities that can occur in two-phase pipe flows with a new efficient algorithm. The fluids are… (more)

Subjects/Keywords: Level set method (LSM); Volume of Fluid (VOF); Mimetic finite difference method; Cylindrical coordinates; sharp interface

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

APA (6^th Edition):

Oud, G. T. (2017). A dual interface method in cylindrical coordinates for two-phase pipe flows. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; 33718e17-681f-4fb6-92ca-362f340fab45 ; 10.4233/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:isbn:978-94-6295-763-3 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45

Chicago Manual of Style (16^th Edition):

Oud, G T. “A dual interface method in cylindrical coordinates for two-phase pipe flows.” 2017. Doctoral Dissertation, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; 33718e17-681f-4fb6-92ca-362f340fab45 ; 10.4233/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:isbn:978-94-6295-763-3 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45.

MLA Handbook (7^th Edition):

Oud, G T. “A dual interface method in cylindrical coordinates for two-phase pipe flows.” 2017. Web. 18 Jan 2021.

Vancouver:

Oud GT. A dual interface method in cylindrical coordinates for two-phase pipe flows. [Internet] [Doctoral dissertation]. Delft University of Technology; 2017. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; 33718e17-681f-4fb6-92ca-362f340fab45 ; 10.4233/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:isbn:978-94-6295-763-3 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45.

Council of Science Editors:

Oud GT. A dual interface method in cylindrical coordinates for two-phase pipe flows. [Doctoral Dissertation]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; 33718e17-681f-4fb6-92ca-362f340fab45 ; 10.4233/uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; urn:isbn:978-94-6295-763-3 ; urn:NBN:nl:ui:24-uuid:33718e17-681f-4fb6-92ca-362f340fab45 ; http://resolver.tudelft.nl/uuid:33718e17-681f-4fb6-92ca-362f340fab45

18. Panneerselvam, R. CFD Simulation of Multiphase Reactors.

Degree: 2009, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/1986

Regional Research Laboratory

Subjects/Keywords: Computational Fluid Dynamics (CFD); Eulerian–Eulerian Model; Eulerian–Lagrangian model; Volume of Fluid (VOF); Hydrodynamics; Fluidised bed reactor; Liquid fluidised bed Contactor

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

APA (6^th Edition):

Panneerselvam, R. (2009). CFD Simulation of Multiphase Reactors. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/1986

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):

Panneerselvam, R. “CFD Simulation of Multiphase Reactors.” 2009. Thesis, Cochin University of Science and Technology. Accessed January 18, 2021. http://dyuthi.cusat.ac.in/purl/1986.

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

MLA Handbook (7^th Edition):

Panneerselvam, R. “CFD Simulation of Multiphase Reactors.” 2009. Web. 18 Jan 2021.

Vancouver:

Panneerselvam R. CFD Simulation of Multiphase Reactors. [Internet] [Thesis]. Cochin University of Science and Technology; 2009. [cited 2021 Jan 18]. Available from: http://dyuthi.cusat.ac.in/purl/1986.

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

Council of Science Editors:

Panneerselvam R. CFD Simulation of Multiphase Reactors. [Thesis]. Cochin University of Science and Technology; 2009. Available from: http://dyuthi.cusat.ac.in/purl/1986

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

NSYSU

19. Wu, Jyun-ming. Slice-Based Water Simulation for Breaking Waves.

Degree: Master, Computer Science and Engineering, 2009, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0904109-155255

► The simulation of breaking wave has a computationally intensive application. In order to reduce the computation, this thesis presents a slice-based water simulation method for… (more)

Subjects/Keywords: Breaking Wave; Volume of Fluid; Slice Method

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APA (6^th Edition):

Wu, J. (2009). Slice-Based Water Simulation for Breaking Waves. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0904109-155255

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):

Wu, Jyun-ming. “Slice-Based Water Simulation for Breaking Waves.” 2009. Thesis, NSYSU. Accessed January 18, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0904109-155255.

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

MLA Handbook (7^th Edition):

Wu, Jyun-ming. “Slice-Based Water Simulation for Breaking Waves.” 2009. Web. 18 Jan 2021.

Vancouver:

Wu J. Slice-Based Water Simulation for Breaking Waves. [Internet] [Thesis]. NSYSU; 2009. [cited 2021 Jan 18]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0904109-155255.

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

Council of Science Editors:

Wu J. Slice-Based Water Simulation for Breaking Waves. [Thesis]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0904109-155255

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

20. Peña Monferrer, Carlos. Computational fluid dynamics multiscale modelling of bubbly flow. A critical study and new developments on volume of fluid, discrete element and two-fluid methods .

Degree: 2017, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/90493

► The study and modelling of two-phase flow, even the simplest ones such as the bubbly flow, remains a challenge that requires exploring the physical phenomena… (more)

▼ The study and modelling of two-phase flow, even the simplest ones such as the bubbly flow, remains a challenge that requires exploring the physical phenomena from different spatial and temporal resolution levels. CFD (Computational Fluid Dynamics) is a widespread and promising tool for modelling, but nowadays, there is no single approach or method to predict the dynamics of these systems at the different resolution levels providing enough precision of the results. The inherent difficulties of the events occurring in this flow, mainly those related with the interface between phases, makes that low or intermediate resolution level approaches as system codes (RELAP, TRACE, ...) or 3D TFM (Two-Fluid Model) have significant issues to reproduce acceptable results, unless well-known scenarios and global values are considered. Instead, methods based on high resolution level such as Interfacial Tracking Method (ITM) or Volume Of Fluid (VOF) require a high computational effort that makes unfeasible its use in complex systems. In this thesis, an open-source simulation framework has been designed and developed using the OpenFOAM library to analyze the cases from microescale to macroscale levels. The different approaches and the information that is required in each one of them have been studied for bubbly flow. In the first part, the dynamics of single bubbles at a high resolution level have been examined through VOF. This technique has allowed to obtain accurate results related to the bubble formation, terminal velocity, path, wake and instabilities produced by the wake. However, this approach has been impractical for real scenarios with more than dozens of bubbles. Alternatively, this thesis proposes a CFD Discrete Element Method (CFD-DEM) technique, where each bubble is represented discretely. A novel solver for bubbly flow has been developed in this thesis. This includes a large number of improvements necessary to reproduce the bubble-bubble and bubble-wall interactions, turbulence, velocity seen by the bubbles, momentum and mass exchange term over the cells or bubble expansion, among others. But also new implementations as an algorithm to seed the bubbles in the system have been incorporated. As a result, this new solver gives more accurate results as the provided up to date. Following the decrease on resolution level, and therefore the required computational resources, a 3D TFM have been developed with a population balance equation solved with an implementation of the Quadrature Method Of Moments (QMOM). The solver is implemented with the same closure models as the CFD-DEM to analyze the effects involved with the lost of information due to the averaging of the instantaneous Navier-Stokes equation. The analysis of the results with CFD-DEM reveals the discrepancies found by considering averaged values and homogeneous flow in the models of the classical TFM formulation. Finally, for the lowest resolution level approach, the system code RELAP5/MOD3 is used for modelling the bubbly flow regime. The code has been modified to… Advisors/Committee Members: Chiva Vicent, Sergio (advisor), Muñoz-Cobo González, José Luís (advisor).

Subjects/Keywords: two-phase flow; bubbles; bubbly flow; vertical upward bubbly flow; multiscale modelling; OpenFOAM; Computational Fluid Dynamics; CFD; Volume of Fluid; VOF; Discrete Element Methods; CFD-DEM; Two-Fluid Model; One-Dimensional Two-Fluid Model; TFM; Quadrature Method Of Moments; QMOM; RELAP; experimental validation; Virtual Needle Probe System; vertical pipe; perforated plate; bubble decompression; Continuous Random Walk; terminal velocity; wake; bubble-induced turbulence; soft-sphere model; bubble-bubble interactions; bubble-wall interactions

11 more images…

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APA (6^th Edition):

Peña Monferrer, C. (2017). Computational fluid dynamics multiscale modelling of bubbly flow. A critical study and new developments on volume of fluid, discrete element and two-fluid methods . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/90493

Chicago Manual of Style (16^th Edition):

Peña Monferrer, Carlos. “Computational fluid dynamics multiscale modelling of bubbly flow. A critical study and new developments on volume of fluid, discrete element and two-fluid methods .” 2017. Doctoral Dissertation, Universitat Politècnica de València. Accessed January 18, 2021. http://hdl.handle.net/10251/90493.

MLA Handbook (7^th Edition):

Peña Monferrer, Carlos. “Computational fluid dynamics multiscale modelling of bubbly flow. A critical study and new developments on volume of fluid, discrete element and two-fluid methods .” 2017. Web. 18 Jan 2021.

Vancouver:

Peña Monferrer C. Computational fluid dynamics multiscale modelling of bubbly flow. A critical study and new developments on volume of fluid, discrete element and two-fluid methods . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2017. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10251/90493.

Council of Science Editors:

Peña Monferrer C. Computational fluid dynamics multiscale modelling of bubbly flow. A critical study and new developments on volume of fluid, discrete element and two-fluid methods . [Doctoral Dissertation]. Universitat Politècnica de València; 2017. Available from: http://hdl.handle.net/10251/90493

University of Cambridge

21. Cutforth, Murray Connelly. Sharp interface schemes for multi-material computational fluid dynamics.

Degree: PhD, 2019, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/297853

► In this thesis we consider the solution of compressible multi-material flow problems, where each material is governed by the Euler equations and the material interface… (more)

▼ In this thesis we consider the solution of compressible multi-material flow problems, where each material is governed by the Euler equations and the material interface may be considered to be a perfect discontinuity separating macroscopic pure-material regions. Working in the framework of Godunov-type finite volume methods, we develop numerical algorithms for tracking the material interface and evolving fluid states. For the task of tracking the location of sharp material interfaces, we focus on volume tracking methods due to their ability to conserve mass in highly deformational flows. Three original contributions are presented in this area. First, the accuracy of the volume-of-fluid algorithm is improved through the addition of marker particles. Next, the efficient moment-of-fluid method is presented. This improves the computational efficiency of the moment-of-fluid method by a factor of three by mapping certain quantities during the interface reconstruction step on to a pre-computed data structure. Finally, a general framework for updating volume fractions based on the solution to a quadratic programming problem is presented. The evolution of fluid states in the full multi-material system is an independent problem. We present developments to two numerical approaches for this problem. The first, the ghost fluid method, is widely used due to the ease in which pure-fluid algorithms can be extended to the multi-material case. We investigate the effect of using a number of different interface tracking methods on the solutions, and find that the conservation errors vary by more than an order of magnitude. The ghost fluid method is then altered such that the ghost state extrapolation step is eliminated from the algorithm, allowing volume fraction-based interface tracking methods to be coupled. In the final chapter, we tackle the same problem using a mixture model-based method. The numerical method presented here is based on work by Miller and Puckett in 1996, in which a six-equation system using the assumption of pressure and velocity equilibrium was used to model two-material flow. We have thoroughly overhauled this method, incorporating Riemann solvers developed for the five-equation system, as well as a robust implicit energy update. We present numerical results on a range of one- and two-dimensional shock-interface interaction test problems which demonstrate the ability of the method to match the solutions from the five-equation model while maintaining a perfectly sharp material interface.

Subjects/Keywords: Multi-material flow; Euler equations; Volume-of-fluid; Moment-of-fluid

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APA (6^th Edition):

Cutforth, M. C. (2019). Sharp interface schemes for multi-material computational fluid dynamics. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/297853

Chicago Manual of Style (16^th Edition):

Cutforth, Murray Connelly. “Sharp interface schemes for multi-material computational fluid dynamics.” 2019. Doctoral Dissertation, University of Cambridge. Accessed January 18, 2021. https://www.repository.cam.ac.uk/handle/1810/297853.

MLA Handbook (7^th Edition):

Cutforth, Murray Connelly. “Sharp interface schemes for multi-material computational fluid dynamics.” 2019. Web. 18 Jan 2021.

Vancouver:

Cutforth MC. Sharp interface schemes for multi-material computational fluid dynamics. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Jan 18]. Available from: https://www.repository.cam.ac.uk/handle/1810/297853.

Council of Science Editors:

Cutforth MC. Sharp interface schemes for multi-material computational fluid dynamics. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://www.repository.cam.ac.uk/handle/1810/297853

22. 金, 洋均. A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source : 外部加熱を受ける可溶解性固体(PCM)の諸非定常過程(溶融・変形・落下)に関する数値解析.

Degree: 博士(工学), 2013, Hokkaido University / 北海道大学

URL: http://hdl.handle.net/2115/53226 ; http://dx.doi.org/10.14943/doctoral.k11055

xvi, 145p

Hokkaido University（北海道大学）. 博士(工学)

Subjects/Keywords: Wire combustion; VOF (Volume Of Fluid) method; Enthalpy-Porosity method; Heat transfer; Phase change; Free surface tracking; Thermocapillary convection; Moving heat flux

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):

金, �. (2013). A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source : 外部加熱を受ける可溶解性固体(PCM)の諸非定常過程(溶融・変形・落下)に関する数値解析. (Thesis). Hokkaido University / 北海道大学. Retrieved from http://hdl.handle.net/2115/53226 ; http://dx.doi.org/10.14943/doctoral.k11055

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):

金, 洋均. “A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source : 外部加熱を受ける可溶解性固体(PCM)の諸非定常過程(溶融・変形・落下)に関する数値解析.” 2013. Thesis, Hokkaido University / 北海道大学. Accessed January 18, 2021. http://hdl.handle.net/2115/53226 ; http://dx.doi.org/10.14943/doctoral.k11055.

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

MLA Handbook (7^th Edition):

金, 洋均. “A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source : 外部加熱を受ける可溶解性固体(PCM)の諸非定常過程(溶融・変形・落下)に関する数値解析.” 2013. Web. 18 Jan 2021.

Vancouver:

金 �. A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source : 外部加熱を受ける可溶解性固体(PCM)の諸非定常過程(溶融・変形・落下)に関する数値解析. [Internet] [Thesis]. Hokkaido University / 北海道大学; 2013. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2115/53226 ; http://dx.doi.org/10.14943/doctoral.k11055.

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

Council of Science Editors:

金 �. A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source : 外部加熱を受ける可溶解性固体(PCM)の諸非定常過程(溶融・変形・落下)に関する数値解析. [Thesis]. Hokkaido University / 北海道大学; 2013. Available from: http://hdl.handle.net/2115/53226 ; http://dx.doi.org/10.14943/doctoral.k11055

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

23. 金, 洋均. A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source.

Degree: 博士(工学), 工学, 2013, Hokkaido University

URL: http://hdl.handle.net/2115/53226

Subjects/Keywords: Wire combustion; VOF (Volume Of Fluid) method; Enthalpy-Porosity method; Heat transfer; Phase change; Free surface tracking; Thermocapillary convection; Moving heat flux

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):

金, �. (2013). A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source. (Doctoral Dissertation). Hokkaido University. Retrieved from http://hdl.handle.net/2115/53226

Chicago Manual of Style (16^th Edition):

金, 洋均. “A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source.” 2013. Doctoral Dissertation, Hokkaido University. Accessed January 18, 2021. http://hdl.handle.net/2115/53226.

MLA Handbook (7^th Edition):

金, 洋均. “A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source.” 2013. Web. 18 Jan 2021.

Vancouver:

金 �. A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source. [Internet] [Doctoral dissertation]. Hokkaido University; 2013. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2115/53226.

Council of Science Editors:

金 �. A multiphase-based numerical study on time-dependent melting, deforming and dripping process of Phase Change Material (PCM) induced by external heat source. [Doctoral Dissertation]. Hokkaido University; 2013. Available from: http://hdl.handle.net/2115/53226

24. Riström, Anton. CFD and Experimental Study of Refuelling and Venting a Fuel System.

Degree: Space Technology, 2019, Luleå University of Technology

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75410

► In 1999, California Air Resources Board (CARB) implemented a regulation that required all gasoline cars sold in California be fitted with an Onboard Refueling… (more)

▼ In 1999, California Air Resources Board (CARB) implemented a regulation that required all gasoline cars sold in California be fitted with an Onboard Refueling Vapor Recovery System (ORVR). The ORVR system is designed to prevent Volatile Organic Compounds (VOCs) from escaping into the atmosphere during refuelling by storing the gas vapours in a carbon canister. Due to the complex nature of the fuel system, making design changes could have large implications on the ORVR performance of the vehicle. It is therefore desirable to develop a CFD model that can predict the effects of design changes, thereby reducing the need to perform physical tests on each design iteration. This master thesis project was performed at the Fuel Systems department at Volvo Cars in order to help reduce project lead times and product development costs by incorporating CFD as a part of the fuel system development cycle. The CFD results obtained were validated through experimental tests that were also performed as part of this project. In this master thesis project, a CFD model was developed to simulate the refuelling of gasoline for a California specification Volvo XC90 with an OPW-11B pump pistol. The model was set up in STAR-CCM+ using the Eulerian Volume of Fluid model for multiphase flow, the RANS realizable k − ε turbulence model and the two layer all y + wall treatment. The effects of the carbon canister were modelled as a porous baffle interface in the simulations where viscous and inertial resistances of the porous media were adjusted to obtain a desired pressure drop across the canister. This method proved to be a suitable simplification for this study. The effects of evaporation as well as a chemical adsorption model for the carbon canister have been excluded from the project due to time limitations. It was found that the CFD simulations were in good agreement with the experimental results, especially with respect to capturing the overall behaviour of the fuel system during refuelling. It was found that resolving the flow spatially (and temporally) in the filler pipe was a crucial part in ensuring solver stability. A pressure difference between experiment and simulation was also observed as a consequence of excluding evaporation from the CFD model. After the CFD model had been verified and validated, changes to different parts of the fuel system were investigated to observe their effects on ORVR performance. These included changing the recirculation line diameter, changing the carbon canister properties and changing the angle of how the pump pistol was inserted into the capless unit. It was found that the recirculation line diameter is a very sensitive design parameter and increasing the diameter would result in fuel vapour leaking back out into the atmosphere. Similarly, increasing the back pressure by swapping to a different carbon canister would result in the leakage of fuel vapour. On the other hand, insignificant changes in system behaviour were observed when the fuel pistol angle was changed.In 1999, California Air Resources…

Subjects/Keywords: CFD; refuelling; automotive; ORVR; fuel; VOF; volume of fluid; multiphase; Applied Mechanics; Teknisk mekanik; Vehicle Engineering; Farkostteknik

…dispersed and stratified flow is illustrated in Figure 5. The Volume of Fluid (VOF)… …regimes of multiphase flow. Volume of Fluid method The VOF method was first published by C.W… …fractional volume of fluid within each cell. It is useful for treating complicated free boundary… …element size. The volume fraction of fluid phase i is defined as: αi = Vi . V (18)… …passed their previous yearly sales volume and sold around 650 000 cars worldwide with 15% of…

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APA (6^th Edition):

Riström, A. (2019). CFD and Experimental Study of Refuelling and Venting a Fuel System. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75410

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):

Riström, Anton. “CFD and Experimental Study of Refuelling and Venting a Fuel System.” 2019. Thesis, Luleå University of Technology. Accessed January 18, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75410.

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

MLA Handbook (7^th Edition):

Riström, Anton. “CFD and Experimental Study of Refuelling and Venting a Fuel System.” 2019. Web. 18 Jan 2021.

Vancouver:

Riström A. CFD and Experimental Study of Refuelling and Venting a Fuel System. [Internet] [Thesis]. Luleå University of Technology; 2019. [cited 2021 Jan 18]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75410.

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

Council of Science Editors:

Riström A. CFD and Experimental Study of Refuelling and Venting a Fuel System. [Thesis]. Luleå University of Technology; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75410

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

New Jersey Institute of Technology

25. Mahady, Kyle. Methods for the direct simulation of nanoscale film breakup and contact angles.

Degree: PhD, Mathematical Sciences, 2015, New Jersey Institute of Technology

URL: https://digitalcommons.njit.edu/dissertations/132

► This thesis investigates direct simulation of fluids with free surfaces and contact lines, with a focus on capturing nanoscale physics in a continuum based… (more)

▼ This thesis investigates direct simulation of fluids with free surfaces and contact lines, with a focus on capturing nanoscale physics in a continuum based computational framework. Free surfaces and contact lines have long presented some of the most challenging problems in computational fluid dynamics. Extensive progress has been made in recent years, and a wide variety of different methods are currently employed for direct simulation in these contexts. The complexity of the full governing equations for such flows poses significant challenges in terms of analytical techniques, and leads to lengthy computational times for direct simulations. For these reasons, reduced models are preferable in many contexts, even when it is not clear that such reduced models strictly apply. Recent advances in nanotechnology motivate the comparison between direct simulations and reduced models by presenting situations in which each possesses advantages; these experiments involve the deposition of nanoscale flat metallic structures onto a surface with unprecedented precision, the almost instantaneous liquefaction of which leads to new initial liquid configurations which have been previously impossible to achieve in an experimental setup. The mechanisms that lead to the instability of these structures are a combination of classical liquid instability (such as Rayleigh-Plateau), novel capillary instabilities driven by the initial geometry, and nanoscale physics. This study begins by examining the differences in qualitative behavior between direct numerical simulation of the full equations and a particular reduced model in the context of wetting and dewetting of drops. Afterwards, a specific initial liquid geometry is presented, the breakup of which requires direct numerical simulation in order to explain the experimental behavior. A parameter study of this geometry demonstrates that it offers a rich variety of dynamics; the breakup of the geometry is found to result in nanoparticle arrangements previously unobtainable using similar techniques, and through careful tuning of the parameters the end state of the breakup can be various combinations of metallic filaments and nanoparticles. While such instabilities are driven by surface tension, an important class of thin film instability is driven by intermolecular fluid/solid interactions. A numerical method is developed which, for the first time, permits the explicit inclusion of this fluid/solid interaction in the context of direct numerical simulations. This method not only allows for modeling and simulating film breakup, but additionally yields a numerical method for the simulation of contact angles as well. Advisors/Committee Members: Shahriar Afkhami, Lou Kondic, Linda Jane Cummings.

Subjects/Keywords: Computational fluid dynamics; Numerical methods; Applied mathematics; Volume of fluid; Mathematics

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APA (6^th Edition):

Mahady, K. (2015). Methods for the direct simulation of nanoscale film breakup and contact angles. (Doctoral Dissertation). New Jersey Institute of Technology. Retrieved from https://digitalcommons.njit.edu/dissertations/132

Chicago Manual of Style (16^th Edition):

Mahady, Kyle. “Methods for the direct simulation of nanoscale film breakup and contact angles.” 2015. Doctoral Dissertation, New Jersey Institute of Technology. Accessed January 18, 2021. https://digitalcommons.njit.edu/dissertations/132.

MLA Handbook (7^th Edition):

Mahady, Kyle. “Methods for the direct simulation of nanoscale film breakup and contact angles.” 2015. Web. 18 Jan 2021.

Vancouver:

Mahady K. Methods for the direct simulation of nanoscale film breakup and contact angles. [Internet] [Doctoral dissertation]. New Jersey Institute of Technology; 2015. [cited 2021 Jan 18]. Available from: https://digitalcommons.njit.edu/dissertations/132.

Council of Science Editors:

Mahady K. Methods for the direct simulation of nanoscale film breakup and contact angles. [Doctoral Dissertation]. New Jersey Institute of Technology; 2015. Available from: https://digitalcommons.njit.edu/dissertations/132

Arizona State University

26. Kedelty, Dominic Sebastian. A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods.

Degree: Mechanical Engineering, 2015, Arizona State University

URL: http://repository.asu.edu/items/29784

► The Volume-of-Fluid method is a popular method for interface tracking in Multiphase applications within Computational Fluid Dynamics. To date there exists several algorithms for reconstruction… (more)

Subjects/Keywords: Mechanical engineering; computational fluid dynamics; fluid mechanics; interface capturing; interface tracking; multiphase; Volume-of-Fluid

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

APA (6^th Edition):

Kedelty, D. S. (2015). A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods. (Masters Thesis). Arizona State University. Retrieved from http://repository.asu.edu/items/29784

Chicago Manual of Style (16^th Edition):

Kedelty, Dominic Sebastian. “A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods.” 2015. Masters Thesis, Arizona State University. Accessed January 18, 2021. http://repository.asu.edu/items/29784.

MLA Handbook (7^th Edition):

Kedelty, Dominic Sebastian. “A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods.” 2015. Web. 18 Jan 2021.

Vancouver:

Kedelty DS. A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods. [Internet] [Masters thesis]. Arizona State University; 2015. [cited 2021 Jan 18]. Available from: http://repository.asu.edu/items/29784.

Council of Science Editors:

Kedelty DS. A Comparison of Performance between Reconstruction and Advection Algorithms for Volume-of-Fluid Methods. [Masters Thesis]. Arizona State University; 2015. Available from: http://repository.asu.edu/items/29784

University of Pretoria

27. [No author]. Multidisciplinary design and optimisation of liquid containers for sloshing and impact .

Degree: 2006, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-01242006-100142/

► The purpose of this study is to perform an investigation of the numerical methods that may contribute to the design and analysis of liquid containers.… (more)

▼ The purpose of this study is to perform an investigation of the numerical methods that may contribute to the design and analysis of liquid containers. The study examines several of these methods individually, namely Computational Fluid Dynamics (CFD) analysis of sloshing and Finite Element Methods (FEM) analysis of impact, to evaluate their contribution to the design cycle. Techniques that enhance the use of the various methods are presented and examined to demonstrate effectiveness. In the case of sloshing analysis, experimental tests performed add to the understanding of the phenomena at hand and qualifies the validity of the numerical method used (CFD). As a final contribution, the study presents a method of utilising impact analysis tools, FEM, and CFD in a Multidisciplinary Design Optimisation (MDO) environment. This is an introductory attempt at demonstrating a single coupled multidisciplinary method of designing liquid containers. The results of the study demonstrate a number of valuable numerical techniques that may be used in the design of liquid containers. The presented Total Deviation Value (TDV) proves to be an effective single quantification of sloshing performance and the CFD tools used to determine the value demonstrate sufficient ability to reproduce the sloshing event itself. More advanced experimental facilities would provide a more in-depth understanding of the limitations of the CFD analysis. The use of numerical optimisation adds a valuable dimension to the use of numerical simulations. Significant design improvements are possible for several design variables without performing exhaustive studies and provide interesting information about design trends. Finally, the use of multiple disciplines, FEM and CFD, in conjunction with the available numerical optimisation routines offers a powerful multidisciplinary design tool that can be adapted to any base geometry and is capable of finding optimal trade offs between the two disciplines according to the designer’s needs. This study provides a platform for further investigations in the use and coupling of sloshing and impact analysis in the design of industrial liquid container applications. Advisors/Committee Members: Prof K Graig (advisor).

Subjects/Keywords: Fluid structure interaction (FSI); Computational fluid dynamics (CFD); Successive response surface method (SRSM); Volume of fluids (VOF); Impact analysis; Total deviation value (TDV); Finite element methods (FEM); Multidisciplinary optimisation (MDO); Liquid sloshing; Mathematical optimisation; UCTD

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

APA (6^th Edition):

author], [. (2006). Multidisciplinary design and optimisation of liquid containers for sloshing and impact . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-01242006-100142/

Chicago Manual of Style (16^th Edition):

author], [No. “Multidisciplinary design and optimisation of liquid containers for sloshing and impact .” 2006. Masters Thesis, University of Pretoria. Accessed January 18, 2021. http://upetd.up.ac.za/thesis/available/etd-01242006-100142/.

MLA Handbook (7^th Edition):

author], [No. “Multidisciplinary design and optimisation of liquid containers for sloshing and impact .” 2006. Web. 18 Jan 2021.

Vancouver:

author] [. Multidisciplinary design and optimisation of liquid containers for sloshing and impact . [Internet] [Masters thesis]. University of Pretoria; 2006. [cited 2021 Jan 18]. Available from: http://upetd.up.ac.za/thesis/available/etd-01242006-100142/.

Council of Science Editors:

author] [. Multidisciplinary design and optimisation of liquid containers for sloshing and impact . [Masters Thesis]. University of Pretoria; 2006. Available from: http://upetd.up.ac.za/thesis/available/etd-01242006-100142/

University of Pretoria

28. Kingsley, Thomas Charles. Multidisciplinary design and optimisation of liquid containers for sloshing and impact.

Degree: Mechanical and Aeronautical Engineering, 2006, University of Pretoria

URL: http://hdl.handle.net/2263/24786

► The purpose of this study is to perform an investigation of the numerical methods that may contribute to the design and analysis of liquid containers.… (more)

▼ The purpose of this study is to perform an investigation of the numerical methods that may contribute to the design and analysis of liquid containers. The study examines several of these methods individually, namely Computational Fluid Dynamics (CFD) analysis of sloshing and Finite Element Methods (FEM) analysis of impact, to evaluate their contribution to the design cycle. Techniques that enhance the use of the various methods are presented and examined to demonstrate effectiveness. In the case of sloshing analysis, experimental tests performed add to the understanding of the phenomena at hand and qualifies the validity of the numerical method used (CFD). As a final contribution, the study presents a method of utilising impact analysis tools, FEM, and CFD in a Multidisciplinary Design Optimisation (MDO) environment. This is an introductory attempt at demonstrating a single coupled multidisciplinary method of designing liquid containers. The results of the study demonstrate a number of valuable numerical techniques that may be used in the design of liquid containers. The presented Total Deviation Value (TDV) proves to be an effective single quantification of sloshing performance and the CFD tools used to determine the value demonstrate sufficient ability to reproduce the sloshing event itself. More advanced experimental facilities would provide a more in-depth understanding of the limitations of the CFD analysis. The use of numerical optimisation adds a valuable dimension to the use of numerical simulations. Significant design improvements are possible for several design variables without performing exhaustive studies and provide interesting information about design trends. Finally, the use of multiple disciplines, FEM and CFD, in conjunction with the available numerical optimisation routines offers a powerful multidisciplinary design tool that can be adapted to any base geometry and is capable of finding optimal trade offs between the two disciplines according to the designer’s needs. This study provides a platform for further investigations in the use and coupling of sloshing and impact analysis in the design of industrial liquid container applications. Advisors/Committee Members: Prof K Graig (advisor).

Subjects/Keywords: Fluid structure interaction (FSI); Computational fluid dynamics (CFD); Successive response surface method (SRSM); Volume of fluids (VOF); Impact analysis; Total deviation value (TDV); Finite element methods (FEM); Multidisciplinary optimisation (MDO); Liquid sloshing; Mathematical optimisation; UCTD

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

APA (6^th Edition):

Kingsley, T. (2006). Multidisciplinary design and optimisation of liquid containers for sloshing and impact. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/24786

Chicago Manual of Style (16^th Edition):

Kingsley, Thomas. “Multidisciplinary design and optimisation of liquid containers for sloshing and impact.” 2006. Masters Thesis, University of Pretoria. Accessed January 18, 2021. http://hdl.handle.net/2263/24786.

MLA Handbook (7^th Edition):

Kingsley, Thomas. “Multidisciplinary design and optimisation of liquid containers for sloshing and impact.” 2006. Web. 18 Jan 2021.

Vancouver:

Kingsley T. Multidisciplinary design and optimisation of liquid containers for sloshing and impact. [Internet] [Masters thesis]. University of Pretoria; 2006. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2263/24786.

Council of Science Editors:

Kingsley T. Multidisciplinary design and optimisation of liquid containers for sloshing and impact. [Masters Thesis]. University of Pretoria; 2006. Available from: http://hdl.handle.net/2263/24786

Brno University of Technology

29. Kaprinay, Zoltán. Kroutící moment deflektoru: Torque momentum of the jet deflector.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/82302

► The aim of this master’s thesis is to determine the torque momentum of the jet deflector of the Pelton turbine using a two-phased CFD simulation.… (more)

Subjects/Keywords: deflektor; Peltonova turbína; CFD; Volume of Fluid; kroutící moment; deflector; Pelton turbine; CFD; Volume of Fluid; torque momentum

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

APA (6^th Edition):

Kaprinay, Z. (2019). Kroutící moment deflektoru: Torque momentum of the jet deflector. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/82302

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):

Kaprinay, Zoltán. “Kroutící moment deflektoru: Torque momentum of the jet deflector.” 2019. Thesis, Brno University of Technology. Accessed January 18, 2021. http://hdl.handle.net/11012/82302.

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

MLA Handbook (7^th Edition):

Kaprinay, Zoltán. “Kroutící moment deflektoru: Torque momentum of the jet deflector.” 2019. Web. 18 Jan 2021.

Vancouver:

Kaprinay Z. Kroutící moment deflektoru: Torque momentum of the jet deflector. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/11012/82302.

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

Council of Science Editors:

Kaprinay Z. Kroutící moment deflektoru: Torque momentum of the jet deflector. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/82302

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

30. Yusuf, Omar Bin. Improved Non-Linear Solution of Dip Coating Flow.

Degree: 2012, University of Western Ontario

URL: https://ir.lib.uwo.ca/etd/807

► A thin layer of film is developed on the surface of a substrate in the dip coating process where the substrate is initially immersed into… (more)

Subjects/Keywords: dip coating; inertia; surface tension; spectral method; non-linear theory; Volume of fluid (VOF); Industrial Engineering; Other Chemical Engineering; Other Mechanical Engineering

…also developed using commercial software FLUENT, where Volume of Fluid (VOF) method… …67 viii Figure 2.19 Validation of VOF model results against the spectral O(Є)… …93 Table E. 3 Properties of fluid… …x29; q Dimensionless fluid flow rate at any cross section of the film (page 17)… …it is necessary to analyze the fluid film which is developed by the withdrawal of the…

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APA (6^th Edition):

Yusuf, O. B. (2012). Improved Non-Linear Solution of Dip Coating Flow. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/807

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):

Yusuf, Omar Bin. “Improved Non-Linear Solution of Dip Coating Flow.” 2012. Thesis, University of Western Ontario. Accessed January 18, 2021. https://ir.lib.uwo.ca/etd/807.

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

MLA Handbook (7^th Edition):

Yusuf, Omar Bin. “Improved Non-Linear Solution of Dip Coating Flow.” 2012. Web. 18 Jan 2021.

Vancouver:

Yusuf OB. Improved Non-Linear Solution of Dip Coating Flow. [Internet] [Thesis]. University of Western Ontario; 2012. [cited 2021 Jan 18]. Available from: https://ir.lib.uwo.ca/etd/807.

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

Council of Science Editors:

Yusuf OB. Improved Non-Linear Solution of Dip Coating Flow. [Thesis]. University of Western Ontario; 2012. Available from: https://ir.lib.uwo.ca/etd/807

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

Open Access Theses and Dissertations