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Inviscid smoothed particle hydrodynamics

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journal contribution
posted on 24.10.2012, 09:06 by W. Dehnen, Lee Cullen
In smoothed particle hydrodynamics (SPH), artificial viscosity is necessary for the correct treatment of shocks, but often generates unwanted dissipation away from shocks. We present a novel method of controlling the amount of artificial viscosity, which uses the total time derivative of the velocity divergence as shock indicator and aims at completely eliminating viscosity away from shocks. We subject the new scheme to numerous tests and find that the method works at least as well as any previous technique in the strong-shock regime, but becomes virtually inviscid away from shocks, while still maintaining particle order. In particular sound waves or oscillations of gas spheres are hardly damped over many periods.

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Citation

Monthly Notices of the Royal Astronomical Society, 2010, 408 (2), pp. 669-683

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP)

issn

0035-8711

eissn

1365-2966

Copyright date

2010

Available date

24/10/2012

Publisher version

http://mnras.oxfordjournals.org/content/408/2/669

Language

en

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