Numerical Simulation of Near Wakes Utilizing a Relaxation Turbulence Model

Numerical solutions of the Navier-Stokes equations are presented for the turbulent supersonic near wake of a two-dimensional wedge/flat-plate model. The turbulent closure is provided by a relaxation eddy viscosity model having its origin in mixing length theory, the velocity defect law, and the classic description of the wake. In the present analysis, further study was made of a composite eddy viscosity model which includes the boundary-layer and wake regions. Although the near-wake region is characterized by strong turbulent inviscid-viscous interaction, results indicate that this complex wake flow can be numerically simulated using a simple relaxation eddy viscosity model.