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Acceleration of Deterministic Boltzmann Solver with Graphics Processing Units

V.V.Aristov, A.A.Frolova, S.A.Zabelok, V.I.Kolobov, R.R.Arslanbekov
Dorodnicyn Computing Centre of the Russian Academy of Sciences, Ul. Vavilova 40, Moscow, 119333, Russia
27th International Symposium on Rarefied Gas Dynamics, AIP Conference Proceedings, Volume 1333, pp. 867-872, 2011

@inproceedings{aristov2011acceleration,

   title={Acceleration of Deterministic Boltzmann Solver with Graphics Processing Units},

   author={Aristov, VV and Frolova, AA and Zabelok, SA and Kolobov, VI and Arslanbekov, RR},

   booktitle={American Institute of Physics Conference Series},

   volume={1333},

   pages={867–872},

   year={2011}

}

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GPU-accelerated computing of the Boltzmann collision integral is studied using deterministic method with piecewise approximation of the velocity distribution function and analytical integration over collision impact parameters. The acceleration of 40 times is achieved compared to CPU calculations for a 3D problem of collisional relaxation of bi-Maxwellian velocity distribution.
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