A new prescription for viscosity in Smoothed Particle Hydrodynamics

Watkins, S. J., Bhattal, A. S., Francis, N., Turner, J. A. and Whitworth, Anthony Peter ORCID: https://orcid.org/0000-0002-1178-5486 1996. A new prescription for viscosity in Smoothed Particle Hydrodynamics. Astronomy and Astrophysics Supplement Series 119 (1) , pp. 177-187. 10.1051/aas:1996104

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Abstract

Smoothed particle hydrodynamics (SPH) is a particle method for modelling hydrodynamical flows that has been successfully applied to a wide range of astrophysical problems. One of its main weaknesses, however, has been its inability to treat viscosity in a rigorous manner. We present a new method that can be used to solve the Navier-Stokes equation for an arbitrary viscosity. We compare the accuracy of the method to alternative methods for treating viscosity in SPH, and apply the method to a series of tests for which there exist analytic solutions. We find that the new method is significantly more accurate than other existing methods, computationally efficient, and that the results of simulations carried out using the method are in excellent agreement with the theory.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	EDP Sciences
ISSN:	0365-0138
Last Modified:	28 Oct 2022 09:05
URI:	https://orca.cardiff.ac.uk/id/eprint/73211

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