A Parallel DSMC Implementation on Unstructured

The direct simulation Monte Carlo (DSMC) method is versatile computational technique suitable for the simulation of a wide range of gas ows. It can deal with thermo-chemical non-equilibrium eeects with relative ease. However its computational cost has limited its application to rareeed or simple transitional ows. However DSMC is well suited to implementation on powerful multi-processor architectures. A parallel implementation of DSMC using unstructured meshes and a domain decomposition technique is presented. The need for a dynamic load balance scheme is obviated and an adaptive domain decomposition (ADD) technique for this purpose is outlined and illustrated with some examples. Use of the ADD scheme is seen to signiicantly improve the performance of the parallel implementation.