Abstract

A method for executing a direct simulation Monte Carlo (DSMC) analysis using parallel processing is described. The method is based on using domain decomposition to distribute the work load among multiple processors, and the DSMC analysis is performed completely in parallel. Message passing is used to transfer molecules between processors and to provide the synchronization necessary for the correct physical simulation. Benchmark problems are described for testing the method, and results are presented that demonstrate the performance on two commercially available multicomputers. The results show that reasonable parallel speedup and efficiency can be obtained if the problem is sized properly to the number of processors. It is projected that, with a massively parallel system, performance exceeding that of current supercomputers is possible.

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