EXPERIENCE IN USING SIMD AND MIMD PARALLELISM FOR COMPUTATIONAL FLUID-DYNAMICS

One of the key objectives of the Applied Research Branch in the Numeri cal Aerodynamic Simulation (NAS) Systems Division at NASA Ames Researc h Center is the accelerated introduction of highly parallel machines i nto a fully operational environment. In this report we summarize some of the experiences with the parallel testbed machines at the NAS Appli ed Research Branch. We discuss the performance results obtained from t he implementation of two computational fluid dynamics (CFD) applicatio ns, an unstructured grid solver and a particle simulation, on the Conn ection Machine CM-2 and the Intel iPSC/860.