Application of a second-moment closure model to simulate the turbulent dispersion from an elevated line source

In this study, a second-moment closure model and an algebraic stress and fl ux model are used to simulate the turbulent dispersion from an elevated lin e source located in a turbulent boundary layer. In the modeling of the Reyn olds stress equation, several models for the triple velocity correlation ar e examined by comparing their predicting results with the direct numerical simulation data. Predicted mean and fluctuating correlation quantities of v elocity and temperature by the second-moment closure model and the algebrai c model are compared with the experimental data. From the comparisons, it i s found that the second-moment closure is capable of reproducing the experi mental results satisfactorily. However, predictions of the algebraic stress and flux model are quite poor.