Title: GRADSPH: A parallel smoothed particle hydrodynamics code for self-gravitating astrophysical fluid dynamics
Authors: Vanaverbeke, Sigfried ×
Keppens, Rony
Poedts, Stefaan
Boffin, H #
Issue Date: Jan-2009
Publisher: North-Holland Pub. Co.
Series Title: Computer physics communications vol:180 issue:7 pages:1164-1182
Abstract: We describe the algorithms implemented in the first version of GRADSPH, a parallel, tree-based, smoothed particle hydrodynamics code for simulating self-gravitating astrophysical systems written in FORTRAN 90. The paper presents details on the implementation of the Smoothed Particle Hydro (SPH) description, where a gridless approach is used to model compressible gas dynamics. This is done in the conventional SPH way by means of 'particles' which sample fluid properties, exploiting interpolating kernels. The equations of self-gravitating hydrodynamics in the SPH framework are derived self-consistently from a Lagrangian and account for variable smoothing lengths ('GRAD-h') terms in both the hydrodynamic and gravitational acceleration equations. A Barnes-Hut tree is used for treating self-gravity and updating the neighbour list of the particles. In addition, the code updates particle properties on their own individual timesteps and uses a basic parallelisation strategy to speed up calculations on a parallel computer system with distributed memory architecture. Extensive tests of the code in one and three dimensions are presented. Finally, we describe the program organisation of the publicly available 3D version of the code, as well as details concerning the structure of the input and output files and the execution of the program.
ISSN: 0010-4655
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
Interdisciplinary Research Facility Life Sciences, Campus Kulak Kortrijk
× corresponding author
# (joint) last author

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