Parallel program complex for 3D unsteady flow simulation

Abstract. A parallel program complex for 3D viscous gas flow simulation is presented. This complex is based on explicit finite difference schemes, which are constructed as an approximation of conservation laws (control volume method) and oriented on use of locally refined grids. Special algorithm and utility for nested grid partitioning was created. The principle of program construction permits to introduce new types of boundary conditions and change as finite difference scheme as governing equation system. Introducing new face types and writing new subroutines for flux calculations may reach it. This opens wide perspectives for the further development of program complex presented. The scalability of program complex was investigated on 2D and 3D subsonic and supersonic problems. The calculations were held on different cluster type multiprocessor computer systems. The parallelization efficiency was more than 90 % for 40 processors and more than 60 % for 600 processors.