A new variant of subgrid dissipation for LES method and simulation of laminar-turbulent transition in subsonic gas flows

Abstract

A novel variant of subgrid dissipation that may be used in LES methods is described and tested. The corresponding mathematical model, based on the quasi-gasdynamic equations differs from the Navier-Stokes system by additional nonlinear dissipative terms. This model is applied to the two-dimensional numerical simulation of the laminar-turbulent transition in a backward-facing step flow in subsonic regime. © 2008 Springer-Verlag Berlin Heidelberg.