A weakly compressible SPH method based on a low-dissipation Riemann solver
Abstract
We present a low-dissipation weakly-compressible SPH method for modeling free-surface flows exhibiting violent events such as impact and breaking. The key idea is to modify a Riemann solver which determines the interaction between particles by a simple limiter to decrease the intrinsic numerical dissipation. The modified Riemann solver is also extended for imposing wall boundary conditions. Numerical tests show that the method resolves free-surface flows accurately and produces smooth, accurate pressure fields. The method is compatible with the hydrostatic solution and exhibits considerably less numerical damping of the mechanical energy than previous methods.
- Publication:
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Journal of Computational Physics
- Pub Date:
- April 2017
- DOI:
- 10.1016/j.jcp.2017.01.027
- Bibcode:
- 2017JCoPh.335..605Z
- Keywords:
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- Weakly-compressible SPH;
- Riemann solver;
- Violent free-surface flows