A NONLINEAR LOW-REYNOLDS-NUMBER K-EPSILON MODEL FOR TURBULENT SEPARATED AND REATTACHING FLOWS .2. THERMAL FIELD COMPUTATIONS

As a sequence of the prior low-Reynolds-number k-epsilon model of Park and Sung, an improved version of the heat transfer model is developed for turbulent separated and reattaching Bows. The equations of the te mperature variance (k(t)heta) and its dissipation rate (epsilon(t)heta ) are solved, together with the equations of k and epsilon. In the pre sent model, the near-wall limiting behavior close to the wall and the nonequilibrium effect away from the wall are incorporated. The validat ion of the model is applied to the turbulent flow over a backward-faci ng step and the how over a flat plate. The predictions of the present model are crosschecked with the existing measurements and DNS data. Th e model performance is shown to be generally satisfactory. Copyright ( C) 1996 Elsevier Science Ltd.