A study of turbulent mixing of confined impinging streams using a new composite turbulence model

This paper presents a study of turbulent mixing in two-dimensional confined impinging streams. A new composite turbulence model is proposed and verifi ed by comparing its predictions with available experimental impingement hea t-transfer data as well as the experimental temperature distributions in im pinging streams obtained in this work. Better agreement between experimenta l and numerical impingement heat-transfer results predicted by this new mod el is noted compared to those predicted by two other low-Reynolds number k- epsilon turbulence models. The model was then used to perform a parametric study of the thermal mixing characteristics of two-dimensional turbulent co nfined impinging streams. It is found that both the operating and geometric parameters of the system have strong effects on mixing in impinging stream s.