Viscous high-speed flow computations by adaptive mesh embedding techniques

Abstract

In the present work, an adaptive mesh embedding technique has been developed for the solution of viscous high Mach number flows. The equations solved are the two-dimensional full Navier Stokes equations. A Runge Kutta finite volume formulation is used with symmetric discretization of both inviscid and viscous fluxes, and adaptive dissipation. The technique has been applied to a shock-wave boundary-layer laminar interaction problem and to a variety of flows over a (double ellipse) blunt body to study the effects of grid quality and topology of the adopted region on the solution accuracy. Computed results indicate that the selection of the most appropriate criterion for adaptation depends upon the physical phenomena of interest.