PREDICTION OF NONEQUILIBRIUM TURBULENT FLOWS WITH EXPLICIT ALGEBRAIC STRESS MODELS

An explicit algebraic stress equation, developed by Gatski and Spezial e, is used in the framework of the K-omega and K-epsilon formulations to predict two-dimensional separated turbulent hows. The nonequilibriu m effects are modeled through coefficients that depend nonlinearly on both rotational and irrotational strains. The proposed models were imp lemented in the Courant-Friedrichs-Lewy three-dimensional Navier-Stoke s code. Comparisons with the experimental data are presented, which cl early demonstrate that explicit algebraic stress models improve the re sponse of standard two-equation models to nonequilibrium effects.