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 temperature variance (k(t)heta) and its dissipation rate (epsilon(t)heta) are solved, together with the equations of k and epsilon. 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 how over a flat plate. The predictions of the present model are crosschecked with the existing measurements and DNS data. The model performance is shown to be generally satisfactory.