SOME ASPECTS OF HIGH-SPEED BLUNT-BODY FLOW COMPUTATIONS WITH ROE SCHEME

This paper discusses some aspects of three-dimensional supersonic and hypersonic inviscid blunt body how computations, The mehtod used is ba sed on the solution of the Euler equations employing an explicit, upwi nd total variation diminishing formulation of the Roe Riemann solver w ithin the cell-centered finite volume approach. A comparative study of various total variation diminishing limiters and entropy fixes is car ried out to identify the most appropriate combination. The effect of u sing cell spacing in the total variation diminishing extrapolations is highlighted. Furthermore, a Mach number dependence and grid sensitivi ty study is carried out on various total variation diminishing limiter s scaled with mesh spacing. Local time stepping and code parallelizati on has been employed to accelerate convergence in terms of effective w ail clock times.