Numerical simulation is performed for stagnating turbulent flows of impinging and countercurrent jets by the Reynolds stress model (RSM). Results are compared with those of the $k\u2212\epsilon $ model and available data to assess the flow characteristics and turbulence models. Three variants of the RSM tested are those of Gibson and Launder (GL), Craft and Launder (GL-CL) and Speziale, Sarkar and Gatski (SSG). As is well known, the $k\u2212\epsilon $ model significantly overestimates turbulent kinetic energy near the wall. Although the RSM is superior to the $k\u2212\epsilon $ model, it shows considerable difference according to how the redistributive pressure-strain term is modeled. Results of the RSM for countercurrent jets are improved with the modified coefficients for the dissipation rate, $C\epsilon 1$ and $C\epsilon 2,$ suggested by Champion and Libby. Anisotropic states of the stress near the stagnation region are assessed in terms of an anisotropy invariant map (AIM).

*Turbulent Reacting Flows*, Academic Press, pp. 309–374.