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A Fast Variational Framework for Accurate Solid-Fluid Coupling

Abstract : Physical simulation has emerged as a compelling animation technique, yet current approaches to coupling simulations of fluids and solids with irregular boundary geometry are inefficient or cannot handle some relevant scenarios robustly. We propose a new variational approach which allows robust and accurate solution on relatively coarse Cartesian grids, allowing possibly orders of magnitude faster simulation. By rephrasing the classical pressure projection step as a kinetic energy minimization, broadly similar to modern approaches to rigid body contact, we permit a robust coupling between fluid and arbitrary solid simulations that always gives a well-posed symmetric positive semi-definite linear system. We provide several examples of efficient fluid-solid interaction and rigid body coupling with sub-grid cell flow. In addition, we extend the framework with a new boundary condition for free-surface flow, allowing fluid to separate naturally from solids.
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Submitted on : Monday, September 20, 2010 - 11:22:54 AM
Last modification on : Monday, April 25, 2022 - 8:22:03 AM
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  • HAL Id : inria-00384725, version 1


Christopher Batty, Florence Bertails, Robert Bridson. A Fast Variational Framework for Accurate Solid-Fluid Coupling. ACM Transactions on Graphics, Association for Computing Machinery, 2007, Proceedings of SIGGRAPH 2007. ⟨inria-00384725⟩



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