Abstract
The paper reports on two parallel message passing implementations of a 3-D pseudospectral based code on top of the PVMe [1] and the MPL Parallel Environment [2], both parallel interfaces tuned for the IBM's scalable parallel system. Specifically, the discussion underlines details of high performing real-to-complex and complex-to-real parallel 3-D FFTs, the two computational kernels in the 3-D pseudospectral integration method, on the base of parallel performances measured on an SP1 16 nodes and on two SP2 16 thin and 16 wide nodes. At the end, some considerations about computational capabilities of the IBM's parallel distributed memory architecture in performing high intensive numerical simulations of 3-D homogeneous turbulent flows are also addressed.
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