Applications of Unstructured Hybrid Grid Method to High-Reynolds Number Viscous Flows

International Journal for Numerical Methods in Fluids, John Wiley & Sons, Num 31, pp.97-111, 1999

MESHING
RESEARCH
CORNER

Dmitri Sharov
Research Center for Computational Science, Fujitsu Limited, Japan

Abstract
In this paper, an unstructured hybrid grid method is discussed for its capability to compute three dimensional compressible viscous flows of complex geometry. A hybrid of prismatic and tetrahedral grids is used to accurately resolve the wall boundary layers for high-Reynolds number viscous flows. The Navier-Stokes equations for compressible flows are solved by a finite volume, cell vertex scheme. The LU-SGS implicit time integration method is used to reduce the computational time for very fine grids in boundary layer regions. Two kinds of one-equation turbulence models are eyaluated here for their accuracy. The method is applied to computations of transonic flows around the ONERA M5 airplane and ONERA M6 wing, and supersonic shock/boundary layer interacting flows inside a scramjet inlet to validate the accuracy and efficiency of the method.