Investigation for a One-Equation SGS Model Using DNS Data of Compressible Turbulent Channel Flow with Isothemal Walls

Abstract

Using the data of the direct numerical simulation (DNS) for the turbulent compressible channel flow with the isothermal walls, a priori test for the one-equation subgrid-scale (SGS) model for turbulent compressible flows is performed. It is comfirmed that the model expressions for the grid-scale (GS) viscous and diffusive terms, SGS temperature-dilatation term with the filtering DNS's heat flux, SGS stress-strain term are effective. The SGS stress and flux are modeled by using the GS strain and coherent structure model function. From a posteriori result of the large-eddy-simulation (LES) using the proposed SGS model, the present model can reproduce the DNS one qualitatively.