Evaluation of a Multiple Instruction/Multiple Data (MIMD) Parallel Computer forCFD Applications

摘要

In an attempt to evaluate the merits of massively parallel processing computersfor the numerical simulation of blast phenomena, the U.S. Army Research Laboratory (ARL) has adapted one of its blast modeling tools to several unique parallel architectures. This report describes the adaptation of the BRL-QID code, a quasi-one-dimensional, finite difference Euler solver, to the Intel iPSC/860 parallel supercomputer. The code was reconfigured for the iPSC/860 using FORTRAN 77 and the Intel iPSC/860 message-passing library. The performance of the code was measured on the iPSC/860 for a variety of problem sizes and processor configurations. The performance was found to be highly dependent on the size of the problem. This problem size dependency was most noticeable when fewer processors were employed. Results of scalability tests indicate that the code performance scales in a roughly linear fashion about extrapolated lines of ideal performance. Nuclear explosion simulation, Shock tubes, Computer programming.