Artificial viscosity in simulation of shock waves by smoothed particle hydrodynamics

Details Artificial viscosity in simulation of shock waves by smoothed particle hydrodynamics Artificial viscosity in simulation of shock waves by smoothed particle hydrodynamics

2007-11-10

arxiv.org/abs/0711.1590v1

Astrophys.Space Sci.313:425-430,2008

Astronomy and Astrophysics

Astrophysics

This manuscript has been accepted by Ap&SS

Scientific paper

10.1007/s10509-007-9712-4

The artificial viscosity is reconsidered in smoothed particle hydrodynamics to prevent inter-particle penetration, unwanted heating, and unphysical solutions. The coefficients in the Monaghan's standard artificial viscosity are considered as time variable, and a restriction on them is proposed such that avoiding the undesired effects in the subsonic regions. The shock formation in adiabatic and isothermal cases are used to study the ability of this modified artificial viscosity recipe. The computer experiments show that the proposal appears to work and the accuracy of this restriction is acceptable.

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