Parallel stratified and rotating turbulence simulation based on MPIs

We describe a parallel implementation for large-eddy simulation (LES) of the stratified and rotating turbulence based on MPI. The parallelization strategy is specified by eliminating the tridiagonal solver with explicit method and by a domain decomposition for solving the poisson equation. In this simulation we have run on CRAY-T3E under the message passing platform MPI with various domain decompositions. The processing time and speed up with respect to each domain decomposition and the scalability of this parallel code of LES are presented. The results show that we can gain up to 16 times faster speed up on 64 processors with xyz-direction domain decomposition and scalable up to 128/spl times/128/spl times/128 which processing time is almost similar to that of 40/spl times/40/spl times/40 on a single processor machine with a sequential code.