Narrow Band FLIP for Liquid Simulations

The Fluid Implicit Particle method (FLIP) for liquid simulations uses particles to reduce numerical dissipation and provide important visual cues for events like complex splashes and small‐scale features near the liquid surface. Unfortunately, FLIP simulations can be computationally expensive, becau...

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Vydáno v:Computer graphics forum Ročník 35; číslo 2; s. 225 - 232
Hlavní autoři: Ferstl, Florian, Ando, Ryoichi, Wojtan, Chris, Westermann, Rüdiger, Thuerey, Nils
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Blackwell Publishing Ltd 01.05.2016
Témata:
Analysis
Categories and Subject Descriptors (according to ACM CCS)
Computational fluid dynamics
Computer simulation
Coupling
Fluid mechanics
Fluids
I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism-Animation
Liquid surfaces
Liquids
Sampling
Simulation
Studies
Visual
Volume
ISSN:0167-7055, 1467-8659
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Shrnutí:The Fluid Implicit Particle method (FLIP) for liquid simulations uses particles to reduce numerical dissipation and provide important visual cues for events like complex splashes and small‐scale features near the liquid surface. Unfortunately, FLIP simulations can be computationally expensive, because they require a dense sampling of particles to fill the entire liquid volume. Furthermore, the vast majority of these FLIP particles contribute nothing to the fluid's visual appearance, especially for larger volumes of liquid. We present a method that only uses FLIP particles within a narrow band of the liquid surface, while efficiently representing the remaining inner volume on a regular grid. We show that a naïve realization of this idea introduces unstable and uncontrollable energy fluctuations, and we propose a novel coupling scheme between FLIP particles and regular grid which overcomes this problem. Our method drastically reduces the particle count and simulation times while yielding results that are nearly indistinguishable from regular FLIP simulations. Our approach is easy to integrate into any existing FLIP implementation.
Bibliografie:ArticleID:CGF12825
istex:0C9708ABB9EBEA5DBBADF4450767C967BB6A3A11
Supporting Information
ark:/67375/WNG-GCTXWX8P-Q
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.12825