A large eddy simulation approach of compressible turbulent flow without density weighting

Abstract

A large eddy simulation (LES) approach of compressible turbulent flow without density weighting (or Favre averaging) is proposed and examined based on compressible turbulent channel flow. In this Brief Communication, we attempt to remove an inconsistent treatment including both the resolved and Favre-averaged variables and to provide a possible approach to deal with the flows with rapid property variation. The subgrid-scale (SGS) terms in the resolved equations of mass, momentum, and energy conservation are modeled reasonably and the relevant coefficients in the SGS models are computed dynamically. The present LES approach is verified to be reliable and effective by comparing with direct numerical simulation results of compressible turbulent channel flow.