REYNOLDS STRESS MODEL IMPLEMENTATION FOR HYPERSONIC FLOW SIMULATIONS

The simulation of hypersonic flows presents some difficulties due to the interaction between boundary layers and shock waves and to the high total enthalpy. In order to achieve more accurate numerical results, with respect to physics, a Reynolds stress model (RSM) is being implemented in the QUADFLOW solver for unstructured grids. This model, developed and tested by Eisfeld, showed promising results on structured grids. It is a combination of two RSM: one that performs better near the wall and another able to achieve good results in the far field. The implementation consisted of writing new routines for the source terms and their derivatives as well as modifying old routines for the computation of viscous fluxes, boundary conditions and far field conditions. Some preliminary results on the flat plate are presented here. The friction coefficient for different turbulence models and for the analytical solutions (the laminar of Blasius and the turbulent of Schultz-Grunow) is compared and the grid convergence of the model is analyzed.