Explicit mesh surfaces for particle based fluids

Jihun Yu, Chris Wojtan, Greg Turk, Chee Yap

Research output: Contribution to journalConference article

Abstract

We introduce the idea of using an explicit triangle mesh to track the air/fluid interface in a smoothed particle hydrodynamics (SPH) simulator. Once an initial surface mesh is created, this mesh is carried forward in time using nearby particle velocities to advect the mesh vertices. The mesh connectivity remains mostly unchanged across time-steps; it is only modified locally for topology change events or for the improvement of triangle quality. In order to ensure that the surface mesh does not diverge from the underlying particle simulation, we periodically project the mesh surface onto an implicit surface defined by the physics simulation. The mesh surface gives us several advantages over previous SPH surface tracking techniques. We demonstrate a new method for surface tension calculations that clearly outperforms the state of the art in SPH surface tension for computer graphics. We also demonstrate a method for tracking detailed surface information (like colors) that is less susceptible to numerical diffusion than competing techniques. Finally, our temporally-coherent surface mesh allows us to simulate highresolution surface wave dynamics without being limited by the particle resolution of the SPH simulation.

Original languageEnglish (US)
Pages (from-to)815-824
Number of pages10
JournalComputer Graphics Forum
Volume31
Issue number2
DOIs
StatePublished - 2012
Event33rd Annual Conference on European Association for Computer Graphics, EUROGRAPHICS 2012 - Cagliari, Sardinia, Italy
Duration: May 13 2012May 18 2012

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design

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