Restatement of the Spalart-Allmaras Eddy-Viscosity Model in Strain-Adaptive Formulation

An overview is given of the strain-adaptive linear Spalart-Allmaras model which provides improved results for nonequilibrium flows while grossly retaining the performance of the Edwards Spalart-Allmaras model in simple boundary-layer and free-shear flows. Although the model cannot be considered universal, it might serve as a good extension of the one-equation modeling framework toward nonequilibrium.