A nonlinear low-Reynolds-number k-ε model for turbulent separated and reattaching flows - II. Thermal field computations

As a sequence of the prior low-Reynolds-number k-ε model of Park and Sung, an improved version of the heat transfer model is developed for turbulent separated and reattaching flows. The equations of the temperature variance (k₀) and its dissipation rate (ε₀) are solved, together with the equations of k and ε. In the present model, the near-wall limiting behavior close to the wall and the nonequilibrium effect away from the wall are incorporated. The validation of the model is applied to the turbulent flow over a backward-facing step and the flow over a flat plate. The predictions of the present model are cross-checked with the existing measurements and DNS data. The model performance is shown to be generally satisfactory.