A new prescription for viscosity in smoothed particle hydrodynamics.

Details A new prescription for viscosity in smoothed particle hydrodynamics. A new prescription for viscosity in smoothed particle hydrodynamics.

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..119..177w&link_type=abstract

Astronomy and Astrophysics Supplement, v.119, p.177-187

Astronomy and Astrophysics

Astrophysics

28

Hydrodynamics, Methods: Numerical

Scientific paper

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.

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