Inviscid smoothed particle hydrodynamics

• Published in: Monthly notices of the Royal Astronomical Society Vol. 408; no. 2; pp. 669 - 683
• Main Authors: Cullen, Lee, Dehnen, Walter
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 21.10.2010; Wiley-Blackwell; Oxford University Press
• Subjects: Astronomy; Astrophysics; Earth, ocean, space; Exact sciences and technology; Fluid mechanics; hydrodynamics; methods: numerical; Particle physics; Shock waves; methods: numerical; hydrodynamics; Viscosity; Divergences; Smoothed particle hydrodynamics method; Gas sphere; Numerical method; Acoustic waves

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 velocit...