Algorithms of Two-Level Parallelization for DSMC of Unsteady Flows in Molecular Gasdynamics

Details Algorithms of Two-Level Parallelization for DSMC of Unsteady Flows in Molecular Gasdynamics Algorithms of Two-Level Parallelization for DSMC of Unsteady Flows in Molecular Gasdynamics

1999-02-11

arxiv.org/abs/cs/9902024v1

Computer Science

Computational Engineering, Finance, and Science

20 pages, 17 postscript figures Submitted to the conference HPCN Europe 99

Scientific paper

The general scheme of two-level parallelization (TLP) for direct simulation Monte Carlo of unsteady gas flows on shared memory multiprocessor computers has been described. The high efficient algorithm of parallel independent runs is used on the first level. The data parallelization is employed for the second one. Two versions of TLP algorithm are elaborated with static and dynamic load balancing. The method of dynamic processor reallocation is used for dynamic load balancing. Two gasdynamic unsteady problems were used to study speedup and efficiency of the algorithms. The conditions of efficient application field for the algorithms have been determined.

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