A nonlinear stress-strain model for wall-bounded turbulent flows

A nonlinear stress-strain model, derived from the modeled Reynolds stress t ransport equation, is modified to account for the near wall effects in wall -bounded turbulent flows. Since it is known that wall reflection of the tur bulent pressure field modifies the pressure-strain correlation, the approac h taken is to introduce a correction to the coefficients in the closure for the pressure-strain correlation purely based on ideas for full Reynolds st ress closures. The stress-strain relation is implemented in the context of the k-epsilon model with a variable C-mu. Results are presented for plane c hannel flow and both zero and adverse pressure gradient boundary layers. Fa vorable results for the anisotropies in the Reynolds stresses are obtained by the new model as validated by comparisons against direct numerical simul ation (DNS) and experimental data. (C) 2001 Elsevier Science Inc. All right s reserved.