4.7 Article

GASOLINE2: a modern smoothed particle hydrodynamics code

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 471, Issue 2, Pages 2357-2369

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1643

Keywords

hydrodynamics; methods: numerical

Funding

  1. SHARCNET/Compute Canada
  2. Natural Sciences and Engineering Research Council of Canada
  3. NSF award [AST-1311956]

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The methods in the GASOLINE2 smoothed particle hydrodynamics (SPH) code are described and tested. GASOLINE2 is the most recent version of the GASOLINE code for parallel hydrodynamics and gravity with identical hydrodynamics to the CHANGA code. As with other Modern SPH codes, we prevent sharp jumps in time-steps, use upgraded kernels and larger neighbour numbers and employ local viscosity limiters. Unique features in GASOLINE2 include its Geometric Density Average Force expression, explicit Turbulent Diffusion terms and Gradient-Based shock detection to limit artificial viscosity. This last feature allows GASOLINE2 to completely avoid artificial viscosity in non-shocking compressive flows. We present a suite of tests demonstrating the value of these features with the same code configuration and parameter choices used for production simulations.

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