Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"embedded boundary"”.
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A Hybrid Framework of CFD Numerical Methods and its Application to the Simulation of Underwater Explosions
… Galerkin, Level Set, Direct Ghost Fluid and Embedded Boundary methods. Computational fluid dynamics (CFD) solvers are developed using this framework of algorithms to demonstrate the computational methods and their ability to effectively and efficiently solve UNDEX problems. Contributions, …
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Numerical Methods for Fluid-Solid Coupled Simulations: Robin Interface Conditions and Shock-Dominated Applications
… to implement the Robin interface condition in an embedded boundary method for coupling a parallel, projection-based incompressible viscous flow solver with a nonlinear finite element solid solver. Both an analytical study and a numerical study reveal that the new algorithm can clearly outperform …
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High performance simulations of yield stress fluids in a structured adaptive mesh refinement framework with embedded boundaries
… domain geometries and around objects, an embedded boundary algorithm has been developed which works alongside the viscoplastic flow solver. We show how this methodology can be utilised to simulate flow inside non-rectangular objects, and investigate fully three-dimensional viscoplastic …
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High-order hybrid methods using Green's functions and finite elements
… framework for linear partial differential boundary value problems by directly defining solutions in integral form. For a Green's function that satisfies the desired boundary conditions, this form is a convolution of the Green's function with the right hand side. However, straightforward …
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Multiphysics Modelling of Lithium-Ion Batteries
… copper. These methods were then extended, using embedded boundary and ghost fluid methods, to the simulation of a battery. Once fully validated, the computational model was used to compare three different mathematical models of a battery, including the most widely used existing model from the …
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Multiphysics algorithms for the simulation of geological materials under extreme conditions: the evolution and transport of ablated material
… of arbitrary geometries, a diffuse-interface embedded boundary method has been implemented. This retains the Cartesian mesh, allowing for the developed numerical solvers to be used with minimal changes that are only applied in the vicinity of the boundaries. The model is then used to perform a …
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Multiphase Fluid-Material Interaction: Efficient Solution Algorithms and Shock-Dominated Applications
… and liquid-gas interfaces are tracked using embedded boundary and level set methods. Then, the developed computational framework is applied to study the behavior a bilayer coating–substrate (i.e., polyurea-aluminum) system under various loading conditions. The observed two-way coupling …
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Spacecraft trajectory optimization using many embedded Lambert problems
… The work of this dissertation extends an embedded boundary value problem (EBVP) technique for preliminary design in the two-body problem. The EBVP technique is designed for direct, unconstrained optimization using many, short-arc, embedded Lambert problems that discretize the trajectory. …
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Long-Pulsed Laser-Induced Cavitation: Laser-Fluid Coupling, Phase Transition, and Bubble Dynamics
… and a measurable focusing or diverging angle. An embedded boundary finite volume method is developed to solve the laser radiation equation on the same mesh created for the NS equations. The fluid mesh usually does not resolve the boundary and propagation directions of the laser beam, leading to …
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Computational Fluid Dynamics with Embedded Cut Cells on Graphics Hardware
… of fluid dynamics simulations featuring embedded cut cells using the CUDA programming platform. We demonstrate efficient generation and handling of geometric surface data in rectilinear computational grids. This is added to a split Euler solver to define piecewise linear cut cells …