ROLES OF PRESSURE TRANSPORT AND INTERMITTENCY FOR COMPUTATION OF TURBULENT FREE SHEAR FLOWS

Abstract

A Reynolds stress model that includes the recent models of the pressure transport term and the intermittency interaction term is applied to compute various free shear flows. The test computations reveal favorable improvements by the pressure transport model near the free-stream edges of the free shear flows. Inclusion of an intermittency interaction term in the dissipation rate equation also significantly enhances the prediction capability of the Reynolds stress model. In particular, predictions of the Reynolds stresses in the high-velocity side of a plane mixing layer and in the outer layer of a plane wake are remarkably improved.