Hybrid smoothed particle hydrodynamics Conference Paper

Author(s): Raveendran, Karthik; Wojtan, Chris; Turk, Greg
Title: Hybrid smoothed particle hydrodynamics
Affiliation IST Austria
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 pressure gradients such as splashing liquids.
Keywords: Smoothed particle hydrodynamics; Coarse grid; Divergence free; Hybrid method; Lagrangian; Local density; Time step; Velocity field; additional forces
Conference Title: SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation
Conference Dates: August 5-7, 2011
Conference Location: Vancouver, BC, Canada
Publisher: ACM  
Location: New York, NY, USA
Date Published: 2011-08-01
Start Page: 33
End Page: 42
Sponsor: This work was funded in part by NSF grants IIS 1130934 and CCF 0811485.
DOI: 10.1145/2019406.2019411
Notes: We thank our anonymous reviewers for their feedback and suggestions. We would also like to thank Jihun Yu for the valuable discussions on SPH and Jie Tan for his help in creating the video for this paper.
Open access: yes (repository)
IST Austria Authors
  1. Chris Wojtan
    34 Wojtan
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