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Showing 1 to 13 of 13 for “"Ghost Fluid Method"”.
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Sharp interface schemes for multi-material computational fluid dynamics
… 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 …
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A blurred interface formulation of The Reference Map Technique for Fluid-Solid Interactions and Fluid-Solid-Solid Interactions
In this work we present a blurred interface method for Fluid-Solid Interactions (FSI) and multiple solids immersed in a fluid or FSSI (Fluid-Solid-Solid Interactions) based on the reference map technique as presented by Kamrin and Rycroft. I will follow the chain of thought which lead from the …
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A Hybrid Framework of CFD Numerical Methods and its Application to the Simulation of Underwater Explosions
… sequentially in an UNDEX scenario in both the fluid and structural domains and these events happen over a wide range of time and spatial scales. Because of the complexity of the physics involved, it is a common practice to separate the description of UNDEX into early-time and late-time, and …
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A Unified Framework for Simulating Impact-Induced Detonation of a Combustible Material in an Elasto-Plastic Confiner
… of equations. It is able to represent inviscid fluids, Newtonian and non-Newtonian viscous fluids, elastic and plastic solids, and reactive species. These materials are presented with a variety of equations of state, and there is a clear methodology for extending the framework to more exotic …
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Modeling Dissolution in Aluminum Alloys
… has been developed using the front-tracking method to study the dissolution of precipitates in an aluminum alloy matrix. This technique is applicable to any alloy system, provided thermodynamic and diffusion data are available. Treatment of the precipitate interface is explored using two …
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Interfaces in Numerical Relativistic hydrodynamics
… sharp interfaces<br/>between relativistic fluids. The motivation for this work lies in obtaining accurate<br/>models of neutron star interiors for use in multidimensional simulations<br/>in general relativity. The interior structure of a neutron star is believed to<br/>contain several …
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Toward computational oncology: nonlinear simulation of centimeter-scale tumour growth in complex, heterogeneous tissues
… tissue. We solve the model using a new level set/ghost fluid method that can produce accurate solutions on arbitrary domains, even when faced with challenging topological changes. This model provides a core framework for the development of more sophisticated models. After a brief presentation of a …
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Computational modeling of advanced, multi-material energetic materials and systems
… on material interfaces. High order and robust methods are needed to maintain sharp representations of these material boundaries. They need to be capable of numerically maintaining stable interfaces between high energy explosive materials and low density inerts such as air. This is a challenging …
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Numerical modelling of plasmas formed and magnetically controlled in hypersonic flows
… electrically conductive, magnetically influenced fluid. This work makes advances in numerical modelling methodologies, combined with an advanced air-plasma equation of state, to permit the realistic and efficient simulation of hypersonically formed plasmas with imposed MHD effects. The …
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Mathematical and Computational Models for Transient Magnetohydrodynamic Flows of Magnetically Confined Plasmas
… both in space and time. A key element of this methodology is the discretisation of topologically complex rigid boundaries as well as material and state of matter interfaces, which represents a significant departure from current, segregated solutions on physics-driven mesh alignment. This is …
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All Mach Number Schemes for Highly Magnetised MHD flows and Multi-material Modelling
The design of numerical methods that are equally valid and effective across different flow regimes has been a longstanding goal, or "holy grail", for CFD researchers. Building on a rich body of literature, and relying on a flux vector splitting framework, in this thesis we develop novel all Mach …
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Acceleration of Eulerian Multi-Material Methods on Highly Parallel Compute Architectures
… numerical schemes commonly used in finite-volume methods, the solution of the Eikonal equation in a narrow band, the Ghost Fluid Method (GFM), and signed-distance function generation from multiple external geometry file types. Additionally, we present the main problems involved in scaling …
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A Runge Kutta Discontinuous Galerkin-Direct Ghost Fluid (RKDG-DGF) Method to Near-field Early-time Underwater Explosion (UNDEX) Simulations
… compressible, inviscid and adiabatic flow, the fluid flow is governed by a set of Euler fluid equations. In practical simulations, we often encounter computational difficulties that include large displacements, shocks, multi-fluid flows with cavitation, spurious waves reflecting from boundaries …