Explicit Mesh Surfaces for Particle Based Fluids

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 connect...

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Bibliographic Details
Published in:Computer graphics forum Vol. 31; no. 2pt4; pp. 815 - 824
Main Authors: Yu, Jihun, Wojtan, Chris, Turk, Greg, Yap, Chee
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01.05.2012
Subjects:
Air flow
Computational fluid dynamics
Computer graphics
Computer science
Computer simulation
Finite element method
Fluid dynamics
Fluid flow
Fluids
I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling-Physically based modeling
I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism-Animation
Simulation
Studies
Tracking
Triangles
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary: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 high‐resolution surface wave dynamics without being limited by the particle resolution of the SPH simulation.
Bibliography:ark:/67375/WNG-WGGGRW3M-7
ArticleID:CGF3062
istex:C2D26F55F07889ADCD0FA43C7D52ECCBE76E3772
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2012.03062.x