Multiple scale modeling of turbulent nonequilibrium boundary layer flows

Abstract

Multiple scale models are investigated in order to improve modeling of turbulent nonequilibrium boundary layers. The model is first calibrated on the standard equilibrium boundary layer and then applied to several nonequilibrium flows. Applications include the flow around an airfoil, the shock–boundary layer interaction, the transonic bump flow, and a three-dimensional bump. The multiple scale model predictions are compared with experimental results and with standard one-scale models. Several improvements are obtained that make the multiple scale model an interesting tool for tackling the prediction of nonequilibrium turbulent flows.