Hybrid Smoothed Particle Hydrodynamics
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Date
2011
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
We present a new algorithm for enforcing incompressibility for Smoothed Particle Hydrodynamics (SPH) by preserving uniform density across the domain. We propose a hybrid method that uses a Poisson solve on a coarse grid to enforce a divergence free velocity field, followed by a local density correction of the particles. This avoids typical grid artifacts and maintains the Lagrangian nature of SPH by directly transferring pressures onto particles.Our method can be easily integrated with existing SPH techniques such as the incompressible PCISPH method as well as weakly compressible SPH by adding an additional force term. We show that this hybrid method accelerates convergence towards uniform density and permits a significantly larger time step compared to earlier approaches while producing similar results. We demonstrate our approach in a variety of scenarios with significant pressuregradients such as splashing liquids.
Description
@inproceedings{:10.2312/SCA/SCA11/033-042,
booktitle = {Eurographics/ ACM SIGGRAPH Symposium on Computer Animation},
editor = {A. Bargteil and M. van de Panne},
title = {{Hybrid Smoothed Particle Hydrodynamics}},
author = {Raveendrany, Karthik and Wojtanz, Chris and Turk, Greg},
year = {2011},
publisher = {The Eurographics Association},
ISSN = {1727-5288},
ISBN = {978-1-4503-0923-3},
DOI = {/10.2312/SCA/SCA11/033-042}
}