An Implicit Density-Based GPU Coupled Solver for Hypersonic Flow Computations in OpenFOAM

The implementation of a time-accurate, implicit density-based solution procedure for hte Navier-Stokes equations at hypersonic speeds in the OpenFOAM Technology is described. The method employs the strong conservation form of the governing equations, using primitive variables as unknowns. Physicochemical properties associated with partially ionized gases in various degrees of thermal and chemical nonequilibrium are accounted and a two-temperature model is used to include the effects of thermal non-equilibrium between the translational rotational and vibrational-electronic temperatures, respectively. Numerical simulations can run on CPUs, and the linear algera can be optionally offloaded on GPUs. Validation tests encompass simulation of high-mach and high-enthalpy flows typical of atmospheric re-entry and supersonic combustion of scramjet engines.