A Common CFD Platform UPACS

NAL(National Aerospace Laboratory) is developing a common parallel CFD Platform UPACS(Unified Platform for Aerospace Computational Simulation), for the purpose of the efficient CFD programming and the aggregation of the CFD technology of NAL. UPACS is coded based on three-dimensional Navier-Stokes equations and supports multi-block grids. It is parallelized by MPI message passing library. In this paper the concept and the structure of UPACS is described and its computational performance is evaluated on NAL NWT(Numerical Wind Tunnel) supercomputer.