RESUMO

Wall models based on turbulent boundary-layer equations and their simpler variants are employed in the LES of turbulent flows past an asymmetric trailing-edge. It is demonstrated that, as first noted by Cabot and Moin (2000), when a RANS type eddy viscosity is used in the wall-layer equations with nonlinear convective terms, its value must be reduced to account for only the unresolved part of the Reynolds stress. A dynamically adjusted mixing-length eddy viscosity is used in the boundary-layer equation model, which is shown to be considerably more accurate than the simpler wall models based on the instantaneous log law. This method predicts low-order velocity statistics in good agreement with those from full LES with resolved wall-layers. The unsteady separation near the trailing-edge is captured correctly, and the prediction of surface pressure fluctuations also shows promise.