Implementation of parallel calculations on graphics processor units in the LOGOS computational fluid dynamics package

A number of tools for the numerical simulation of three-dimensional flows of viscous compressible gas with the use of graphics processor units are developed. The finite volume method implemented in the LOGOS package is used to solve the Navier-Stokes equations on unstructured meshes. Different methods for the flux calculations through faces of finite volumes and features of implementation of a turbulence model are considered. The CUDA technology is used to implement parallel numerical algorithms. The solutions to some benchmark problems of internal and external gas dynamics are discussed. The speed-up of calculations performed on graphics processor units compared to the calculations performed on the corresponding central processor unit is analyzed.