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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 29 stycznia 2023

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1

Zhang, Junfang. "Computer simulation of nanorheology for inhomogenous fluids." Australasian Digital Thesis Program, 2005. http://adt.lib.swin.edu.au/public/adt-VSWT20050620.095154.

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Thesis (PhD) - Swinburne University of Technology, School of Information Technology, Centre for Molecular Simulation - 2005.<br>A thesis submitted in fulfilment of requirements for the degree of Doctor of Philosophy, Centre for Molecular Simulation, School of Information Technology, Swinburne University of Technology - 2005. Typescript. Bibliography: p. 164-170.

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Andersson, Tomas. "Controlling the fluid dynamics : an analysis of the workflow of fluids." Thesis, University of Gävle, Department of Mathematics, Natural and Computer Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-155.

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<p>A scene containing dynamic fluids can be created in a number of ways. There are two approaches that will highlight the problems and obstacles that might occur. Today’s leading fluid simulator, RealFlow, simulates the fluid dynamics. A comparison between the two approaches will be made and are analyzed. Through experimentation, one of the approaches fails to produce the set requirements in the experiment and furthermore the two approaches differ in efficiency.</p>

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Barran, Brian Arthur. "View dependent fluid dynamics." Texas A&M University, 2006. http://hdl.handle.net/1969.1/3827.

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This thesis presents a method for simulating fluids on a view dependent grid structure to exploit level-of-detail with distance to the viewer. Current computer graphics techniques, such as the Stable Fluid and Particle Level Set methods, are modified to support a nonuniform simulation grid. In addition, infinite fluid boundary conditions are introduced that allow fluid to flow freely into or out of the simulation domain to achieve the effect of large, boundary free bodies of fluid. Finally, a physically based rendering method known as photon mapping is used in conjunction with ray tracing to g

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Greenwood, Shannon Thomas. "The incorporation of bubbles into a computer graphics fluid simulation." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/2267.

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We present methods for incorporating bubbles into a photorealistc fluid simulation. Previous methods of fluid simulation in computer graphics do not include bubbles. Our system automatically creates bubbles, which are simulated on top of the fluid simulation. These bubbles are approximated by spheres and are rendered with the fluid to appear as one continuous surface. This enhances the overall realism of the appearance of a splashing fluid for computer graphics. Our methods leverage the particle level set representation of the fluid surface. We create bubbles from escaped marker particle

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Wrenninge, Magnus. "Fluid Simulation for Visual Effects." Thesis, Linköping University, Department of Science and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2347.

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<p>This thesis describes a system for dealing with free surface fluid simulations, and the components needed in order to construct such a system. It builds upon recent research, but in a computer graphics context the amount of available literature is limited and difficult to implement. Because of this, the text aims at providing a solid foundation of the mathematics needed, at explaining in greater detail the steps needed to solve the problem, and lastly at improving some aspects of the animation process as it has been described in earlier works. </p><p>The aim of the system itself is to provi

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6

Woodburn, Peter. "Computational fluid dynamics simulation of fire-generated flows in tunnels and corridors." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282879.

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Thampy, Sajjit. "Feature tracking in two dimensional time varying datasets." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-04082003-160214.

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Doddamani, Niranjana Sharma. "A hierarchy based interface for integration of scientific applications." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-12032002-141349.

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9

Nelson, Christopher C. "Simulations of spatially evolving compressible turbulence using a local dynamic subgrid model." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/12002.

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Smith, Thomas M. "Unsteady simulations of turbulent premixed reacting flows." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13097.

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Melek, Zeki. "Interactive simulation of fire, burn and decomposition." Texas A&M University, 2007. http://hdl.handle.net/1969.1/85805.

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This work presents an approach to effectively integrate into one unified modular fire simulation framework the major processes related to fire, namely: a burning process, chemical combustion, heat distribution, decomposition and deformation of burning solids, and rigid body simulation of the residue. Simulators for every stage are described, and the modular structure enables switching to different simulators if more accuracy or more interactivity is desired. A "Stable Fluids" based three gas system is used to model the combustion process, and the heat generated during the combustion is used to

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12

Fredriksson, Adam. "Visual Comparison of Lagrangian and Semi-Lagrangian fluid simulation." Thesis, Blekinge Tekniska Högskola, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-14838.

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Context. Fluid simulations are an important part for enhancing the visualization of games, movies and other graphical applications. Fluid simulations can be achieved in different type of context ranging between slow, high-quality simulations which is mainly used for movies, to fast lower-quality simulations which is primarily used for real-time applications such as games. Objectives. The goal was to compare the visual appearance of a Lagrangian method and a semiLagrangian method when it came to realistic appearance. Methods. Identical scenes of water being rendered are made for both the Lagra

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13

Brown, Jason. "Computational fluid dynamics in an equation-based, acausal modeling environment." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37247.

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The practice of building simulation is split between domains such as energy, multizone airflow, computational fluid dynamics (CFD) airflow, and controls analysis, as well as between the tools which conduct these analyses. Previous work in the integration of these analyses and tools have focused on linking existing tools, written in algorithmic programming languages, together by interfacing them using coupling mechanisms implemented in algorithmic programming languages. This thesis takes a different approach, using the equation-based, object oriented modeling language Modelica to create model

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Jury, Simon Ian. "Computer simulation of complex fluids using dissipative particle dynamics." Thesis, University of Edinburgh, 1999. http://hdl.handle.net/1842/12323.

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A parallel code has been developed to implement the Dissipative Particle Dynamics (DPD) simulation algorithm. DPD is a particle based method which simulates the fluid at a mesoscopic scale. Since the DPD interactions are both soft (compared to the potentials used in molecular dynamics) and momentum conserving, DPD offers the possibility of reproducing hydrodynamic behaviour at large length and time scales. Other techniques for hydrodynamic flow simulation are reviewed before the DPD algorithm is presented together with some of the coding issues arising from using a parallel implementation. Equ

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Marcelli, Gianluca, and g. marcelli@imperial ac uk. "The role of three-body interactions on the equilibrium and non-equilibrium properties of fluids from molecular simulation." Swinburne University of Technology. Centre for Molecular Simulation, 2001. http://adt.lib.swin.edu.au./public/adt-VSWT20060112.082425.

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The aim of this work is to use molecular simulation to investigate the role of three-body interatomic potentials in noble gas systems for two distinct phenomena: phase equilibria and shear flow. In particular we studied the vapour-liquid coexisting phase for pure systems (argon, krypton and xenon) and for an argon-krypton mixture, utilizing the technique called Monte Carlo Gibbs ensemble. We also studied the dependence of the shear viscosity, pressure and energy with the strain rate in planar Couette flow, using a non-equilibrium molecular simulation (NEMD) technique. The results we present in

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Lea, Jimmy Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "The computational fluid dynamics analysis and optimisation of process vessels used in the manufacture of military propellants and high explosives." Publisher:University of New South Wales. Chemical Sciences & Engineering, 2007. http://handle.unsw.edu.au/1959.4/40560.

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This research focuses on the computational fluid dynamics modelling and simulation of the existing reactors and mixing tanks employed by the Australian Defence Industries to manufacture military propellants for gun projectiles and small rockets; high explosives for naval gun projectiles and aerial bombs. The main objective of this research is to gain a thorough understanding of these process vessels via research and to provide recommendations to improve their performance. Reactors and mixing tanks were chosen as the test unit operations because although they contribute significantly to the man

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Myhrberg, Viktor. "Fluid Dynamics as a Foundation for Game Mechanics." Thesis, Uppsala universitet, Institutionen för speldesign, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-419539.

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This thesis investigates whether a game world based solely on fluid dynamics could be an interesting alternative to one based on rigid bodies by presenting a prototype to players where they can control the movement of a fluid. The players evaluate the prototype’s responsiveness, intuitiveness, visual appeal, immersion, and how well they think the fluid could represent ghosts, flocks, magic, and a platformer avatar by rating them vocally while playing. The fluid physics engine prototype is a simple grid-based one that utilizes the ideal gas law and pressure gradient force to calculate the flow

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18

Drewniak, Marta. "Computer Simulations of Dilute Polymer Solutions: Chain Overlaps and Entanglements." Thesis, University of North Texas, 1996. https://digital.library.unt.edu/ark:/67531/metadc278086/.

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Chain conformations and the presence of chain overlaps and entanglements in dilute polymer solutions have been analyzed. The fundamental problem of existence of chain overlaps in dilute solutions is related to the drag reduction phenomenon (DR). Even though DR occurs in solutions with the concentration of only few parts per million (ppm), some theories suggest that entanglements may play an important role in DR mechanism. Brownian dynamics technique have been used to perform simulations of dilute polymer solutions at rest and under shear flow. A measure of interchain contacts and two different

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Jackson, Mark John Clinical School St Vincent's Hospital Faculty of Medicine UNSW. "A study of vein graft haemodynamics using computational fluid dynamics techniques." Awarded by:University of New South Wales, 2007. http://handle.unsw.edu.au/1959.4/38575.

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Atherosclerosis, the leading cause of mortality in Western societies, affects large elastic arteries, causing focal deposition of proliferative inflammatory and lipid-laden cells within the artery. Several risk factors have been causally implicated in the ???reaction to injury??? hypothesis first described by Ross in 1969. The ???injury??? sustained by endothelial cells may be either mechanical or chemical. Environmental factors have a role in the production of chemical agents that are injurious to the endothelium. Mechanical stresses such as wall tensile stress are proportional to systemic bl

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Forrester, Alexander I. J. "Efficient global aerodynamic optimisation using expensive computational fluid dynamics simulations." Thesis, University of Southampton, 2004. https://eprints.soton.ac.uk/45902/.

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The expense of high fidelity computational fluid dynamics, in terms of time and amount of computing resources required, excludes such methods from the early stages of aircraft design. It is only in the early, conceptual, stage of aircraft development where a wide range of designs are considered and global, rather than local, optimisation can play a key role. This thesis deals with methods which may allow high cost computer simulations to be used within a global optimisation design process. The first half of the thesis concentrates on the use of surrogate modeling of the optimisation design spa

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Moreau, Filip. "Physics-Based, Real-Time Simulation of Fluid-Immersed Rigid Bodies." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-43343.

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Objects interacting with fluid are of high interest to visually present in three-dimensional applications, such as computer games and virtual environments. For presenting the interactions with high correctness, dynamic rigid body simulation may be used. This paper presents methods for efficient, physics-based real-time simulation of fluid-immersed rigid bodies, where the correctness of the simulation is maintained. Simulated forces include gravity, buoyancy, thrust, drag, and lift. To have the simulation run efficiently in real-time, discretization of the simulated rigid body is made by applyi

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Sjöstedt, Carl-Johan. "On the modular modelling for dynamical simulation with application to fluid systems." Licentiate thesis, KTH, Machine Design (Div.), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-566.

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<p>This licentiate thesis highlights some topics on modular modelling for dynamical simulation with application to fluid systems. The results are based on experience from the development of the fuel cell component simulation environment NFCCPP. The general application is cross-enterprise simulation of technical systems. There are four main topics: component definition including selection of interfaces, lumped modelling of fluid components, the use of dynamical equations to reduce simulation time in large systems and methods of to protect the intellectual property (IP) of a component.</p><p>An

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Srinivasan, Raghavan. "CFD Heat Transfer Simulation of the Human Upper Respiratory Tract for Oronasal Breathing Condition." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/29310.

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In this thesis. a three dimensional heat transfer model of heated airflow through the upper human respiratory tract consisting of nasal, oral, trachea, and the first two generations of bronchi is developed using computational fluid dynamics simulation software. Various studies have been carried out in the literature investigating the heat and mass transfer characteristics in the upper human respiratory tract, and the study focuses on assessing the injury taking place in the upper human respiratory tract and identifying acute tissue damage based on level of exposure. The model considered is for

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24

Tang, Hansong. "Numerical simulation of unsteady three dimensional incompressible flows in complex geometries." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/19324.

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Steiner, Thomas. "Dissipative particle dynamics simulation of microfluidic systems with fluid particle methods on high performance computers." Aachen Shaker, 2009. http://d-nb.info/995271100/04.

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Holladay, Seth R. "Optimized Simulation of Granular Materials." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3856.

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Visual effects for film and animation often require simulated granular materials, such as sand, wheat, or dirt, to meet a director's needs. Simulating granular materials can be time consuming, in both computation and labor, as these particulate materials have complex behavior and an enormous amount of small-scale detail. Furthermore, a single cubic meter of granular material, where each grain is a cubic millimeter, would contain a billion granules, and simulating all such interacting granules would take an impractical amount of time for productions. This calls for a simplified model for granul

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Fahey, Mark, and n/a. "Assessment of the suitability of CFD for product design by analysing complex flows around a domestic oven." University of Otago. Department of Design Studies, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070417.111809.

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Competitive global markets are increasing the commercial pressure on manufacturing companies to develop better products in less time. To meet these demands, the appliance manufacturer, Fisher & Paykel, has considered the use of computer simulation of fluid flows to assist in product design. This technology, known as Computational Fluid Dynamics (CFD), has the potential to provide rewarding insight into the behaviour of designs involving fluids. However, the investment in CFD is not without risk. This thesis investigates the use of CFD in oven design expressly to evaluate the numerical accuracy

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Li, Xiaoyi. "Computational study of fluid particles dynamics of drops, rheology of emulsions and mechanics of biological cells /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 283 p, 2007. http://proquest.umi.com/pqdweb?did=1362531671&sid=35&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Wang, Huamin. "Practical water animation using physics." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31745.

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Thesis (Ph.D)--Computing, Georgia Institute of Technology, 2010.<br>Committee Chair: Greg Turk; Committee Member: C. Karen Liu; Committee Member: Irfan Essa; Committee Member: Jarek Rossignac; Committee Member: Peter J. Mucha. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Rahimian, Abtin. "Parallel algorithms for direct blood flow simulations." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43611.

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Fluid mechanics of blood can be well approximated by a mixture model of a Newtonian fluid and deformable particles representing the red blood cells. Experimental and theoretical evidence suggests that the deformation and rheology of red blood cells is similar to that of phospholipid vesicles. Vesicles and red blood cells are both area preserving closed membranes that resist bending. Beyond red blood cells, vesicles can be used to investigate the behavior of cell membranes, intracellular organelles, and viral particles. Given the importance of vesicle flows, in this thesis we focus in efficient

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Frankfurt, Ricardo. "Simulação de transporte de massa de um soluto em meio poroso com auxílio do CFD (Computer Fluid Dynamics)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-29012009-162554/.

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Com o avanço dos computadores pessoais, problemas técnicos complexos, antes restritos aos grandes centros de pesquisas internacionais, passam a ser acessíveis pelas mais diversas áreas do conhecimento, como as engenharias e em particular a Engenharia Química. Fenômenos físicos são representados matematicamente por equações diferenciais, que na maioria das vezes não possuem solução analítica possível. O CFD ( Computer Fluid Dynamics) é uma técnica numérica iterativa, que busca a solução destas equações diferenciais através da discretização do domínio estudado e das equações que governam o fenôm

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Wake, Amanda Kathleen. "Modeling Fluid Mechanics in Individual Human Carotid Arteries." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7562.

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In the interest of furthering the understanding of hemodynamics, this study has developed a method for modeling fluid mechanics behavior in individual human carotid arteries. A computational model was constructed from magnetic resonance (MR) data of a phantom carotid bifurcation model, and relevant flow conditions were simulated. Results were verified by comparison with previous in vitro experiments. The methodology was extended to create subject-specific carotid artery models from geometry data and fluid flow boundary conditions which were determined from MR and phase contrast MR (PCMR) sc

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Awad, Mohammad Ali. "An investigation of flux-limiting and non-linear solution techniques for efficient simulation of transport in porous media." Thesis, Queensland University of Technology, 2000. https://eprints.qut.edu.au/37057/1/37057_Awad_2000.pdf.

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This thesis presents a comprehensive analysis of efficient computational techniques for simulating transport in porous media. The equations that govern the flow of liquids in porous media are ubiquitous in science and engineering. For example, the governing equations find application in fields as diverse as drying, ground water flow, contamination and petroleum reservoir engineering. Typically, the conservation laws that are encountered are highly non-linear and have steep fronts that require resolution in time. It is one of the aims of this work to analyse the use of higher order spatial wei

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Steiner, Thomas [Verfasser]. "Dissipative Particle Dynamics : Simulation of Microfluidic Systems With Fluid Particle Methods on High Performance Computers / Thomas Steiner." Aachen : Shaker, 2009. http://d-nb.info/1156518954/34.

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Blom, Andrej. "Comparing FumeFx with Autodesk Maya Dynamic System." Thesis, University of Gävle, Department of Mathematics, Natural and Computer Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-610.

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<p>One of the main problem areas within computer graphics is simulating natural phenomena’s, working with fluid solvers, and particle systems. In the special effects industry, there is a demand for mimicking appearance of common special effect such as fire, smoke, and water. Autodesk Maya and FumeFx are used for exploring those methods in creating smoke and fire simulations and implementing those into a</p><p>large dynamic system, while researching the possibility to efficiently control and modify an entire dynamic system on a per object level. Final production renders results are from both Ma

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Lundqvist, Viktor. "A smoothed particle hydrodynamic simulation utilizing the parallel processing capabilites of the GPUs." Thesis, Linköping University, Department of Science and Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-21761.

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<p>Simulating fluid behavior has proven to be a demanding challenge which requires complex computational models and highly efficient data structures. Smoothed Particle Hydrodynamics (SPH) is a particle based computational model used to simulate fluid behavior that has been found capable of producing convincing results. However, the SPH algorithm is computational heavy which makes it cumbersome to work with.</p><p>This master thesis describes how the SPH algorithm can be accelerated by utilizing the GPU’s computational resources. It describes a model for how to distribute the work load on the G

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Fimbres, Weihs Gustavo Adolfo UNESCO Centre for Membrane Science &amp Technology Faculty of Engineering UNSW. "Numerical simulation studies of mass transfer under steady and unsteady fluid flow in two- and three-dimensional spacer-filled channels." Publisher:University of New South Wales. UNESCO Centre for Membrane Science & Technology, 2008. http://handle.unsw.edu.au/1959.4/41453.

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Hollow fibre and spiral wound membrane (SWM) modules are the most common commercially available membrane modules. The latter dominate especially for RO, NF and UF and are the focus of this study. The main difficulty these types of modules face is concentration polarisation. In SWM modules, the spacer meshes that keep the membrane leaves apart also help reduce the effects of concentration polarisation. The spacer filaments act as flow obstructions, and thus encourage flow destabilisation and increase mass transfer enhancement. One of the detrimental aspects of the use of spacers is an increase

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Ertbruggen, Caroline van. "Study of aerosol transport and deposition in the lungs using computational fluid dynamics (CFD)." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211037.

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We have studied gas flow and particle deposition in a realistic three-dimensional model of the bronchial tree, extending from the trachea to the segmental bronchi (7th airway generation for the most distal ones) using Computational Fluid Dynamics (CFD). The model is based on the morphometrical data of Horsfield et al. [J. Appl. Physiol. 31: 207-217, 1971] and on bronchoscopic and CT images, which give the spatial 3D-orientation of the curved ducts. It incorporates realistic angles of successive branching planes. Steady inspiratory flow varying between 50cm³/s and 500cm³/s was simulated as well

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Ha, Oai The. "Modeling and Numerical Investigation of Hot Gas Defrost on a Finned Tube Evaporator Using Computational Fluid Dynamics." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/400.

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Defrosting in the refrigeration industry is used to remove the frost layer accumulated on the evaporators after a period of running time. It is one way to improve the energy efficiency of refrigeration systems. There are many studies about the defrosting process but none of them use computational fluid dynamics (CFD) simulation. The purpose of this thesis is (1) to develop a defrost model using the commercial CFD solver FLUENT to simulate numerically the melting of frost coupled with the heat and mass transfer taking place during defrosting, and (2) to investigate the thermal response of the e

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Kim, Yootai. "Control of physics-based fluid animation using a velocity-matching method." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1149087881.

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Gempesaw, Daniel. "A multi-resolution discontinuous Galerkin method for rapid simulation of thermal systems." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42775.

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Efficient, accurate numerical simulation of coupled heat transfer and fluid dynamics systems continues to be a challenge. Direct numerical simulation (DNS) packages like FLU- ENT exist and are sufficient for design and predicting flow in a static system, but in larger systems where input parameters can change rapidly, the cost of DNS increases prohibitively. Major obstacles include handling the scales of the system accurately - some applications span multiple orders of magnitude in both the spatial and temporal dimensions, making an accurate simulation very costly. There is a need for a simula

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Vantieghem, Stijn. "Numerical simulations of quasi-static magnetohydrodynamics using an unstructured finite volume solver: development and applications." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209929.

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Dans cette dissertation, nous considérons l’écoulement des liquides conducteurs d’électricité dans un champ magnétique externe. De tels écoulements sont décrits par les équations de la magnétohydrodynamique (MHD) quasi-statique, et sont fréquemment rencontrés dans des applications pratiques. Il suit qu’il y a un intérêt fort pour des outils numérques qui peuvent simuler ces écoulements dans des géometries complexes.<p>La première partie de cette thèse (chapitres 2 et 3) est dédiée à la présentation de la machinerie numérique qui a été utilisée et implémentée afin de résoudre les équations de l

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Patel, Nayan V. "Simulation of Hydrodynamic Fragmentation from a Fundamental and an Engineering Perspective." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16225.

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Liquid fragmentation phenomenon is explored from both a fundamental (fully resolved) and an engineering (modeled) perspective. The dual objectives compliment each other by providing an avenue to gain further understanding into fundamental processes of atomization as well as to use the newly acquired knowledge to address practical concerns. A compressible five-equation interface model based on a Roe-type scheme for the simulation of material boundaries between immiscible fluids with arbitrary equation of state is developed and validated. The detailed simulation model accounts for surface-tensio

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Thatte, Azam. "Multi-scale multi-physics model and hybrid computational framework for predicting dynamics of hydraulic rod seals." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37272.

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Rod seals are one of the most critical components of hydraulic systems. However, the fundamental physics of seal behavior is still poorly understood and the seal designers have virtually no analytical tools with which to predict the behavior of potential seal designs. In pursuit of a comprehensive physics based seal analysis/ design tool, in this work, a multi-scale multi-physics (MSMP) seal model is developed. The model solves the transient problem involving macro-scale viscoelastic deformation mechanics, macro-scale contact, micro-scale two phase fluid mechanics in the sealing zone, micro-sc

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Donzis, Diego Aaron. "Scaling of turbulence and turbulent mixing using Terascale numerical simulations." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19794.

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Fundamental aspects of turbulence and turbulent mixing are investigated using direct numerical simulations (DNS) of stationary isotropic turbulence, with Taylor-scale Reynolds numbers ranging from 8 to 650 and Schmidt numbers from 1/8 to 1024. The primary emphasis is on important scaling issues that arise in the study of intermittency, mixing and turbulence under solid-body rotation. Simulations up to 2048^3 in size have been performed using large resource allocations on Terascale computers at leading supercomputing centers. Substantial efforts in algorithmic development have also been unde

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Svidrytski, Artur [Verfasser], and Ulrich [Akademischer Betreuer] Tallarek. "Study of random porous morphologies by means of statistical analysis and computer simulations of fluid dynamics / Artur Svidrytski ; Betreuer: Ulrich Tallarek." Marburg : Philipps-Universität Marburg, 2021. http://d-nb.info/1226287387/34.

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Makgata, Katlego Webster. "Computational analysis and optimisation of the inlet system of a high-performance rally engine." Diss., Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-01242006-123639.

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Marano, Susan Aileen. "Smarticles: A Method for Identifying and Correcting Instability and Error Caused by Explicit Integration Techniques in Physically Based Simulations." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1304.

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Using an explicit integration method in physically based animations has many advantages including conceptual and computational simplicity, however, it re- quires small time steps to ensure low numerical instability. Simulations with large numbers of individually interacting components such as cloth, hair, and fluid models, are limited by the sections of particles most susceptible to error. This results in the need for smaller time steps than required for the majority of the system. These sections can be diverse and dynamic, quickly changing in size and location based on forces in the system. I

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Parisi, Valerio. "Large Eddy Simulation of a Stagnation Point Reverse Flow Combustor." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13995.

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In this study, numerical simulations of a low emission lab-scale non-premixed combustor are conducted and analyzed. The objectives are to provide new insight into the physical phenomena in the SPRF (Stagnation Point Reverse Flow) combustor built in the Georgia Tech Combustion Lab, and to compare three Large Eddy Simulation (LES) combustion models (Eddy Break-Up [EBU], Steady Flamelet [SF] and Linear Eddy Model [LEM]) for non-premixed combustion. The nominal operating condition of the SPRF combustor achieves very low NOx and CO emissions by combining turbulent mixing of exhaust gases with prehe

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Abbasi, Baharanchi Ahmadreza. "Development of a Two-Fluid Drag Law for Clustered Particles Using Direct Numerical Simulation and Validation through Experiments." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2489.

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This dissertation focused on development and utilization of numerical and experimental approaches to improve the CFD modeling of fluidization flow of cohesive micron size particles. The specific objectives of this research were: (1) Developing a cluster prediction mechanism applicable to Two-Fluid Modeling (TFM) of gas-solid systems (2) Developing more accurate drag models for Two-Fluid Modeling (TFM) of gas-solid fluidization flow with the presence of cohesive interparticle forces (3) using the developed model to explore the improvement of accuracy of TFM in simulation of fluidization flow of

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