TY - JOUR
TI - Numerical modeling of a turbulent semi-confined slot jet impinging on a concave surface
AU - Ahmadi Hadi
AU - Rajabi-Zargarabadi Mehran
AU - Mujumdar Arun S
AU - Mohammadpour Javad
JN - Thermal Science
PY - 2015
VL - 19
IS - 1
SP - 129
EP - 140
PT - Article
AB - This article presents results from a numerical study of a turbulent slot jet  impinging on a concave surface. Five different low Reynolds number k-ε models  were evaluated to predict the heat transfer under a two dimensional steady  turbulent jet. The effects of flow and geometrical parameters (e.g. jet  Reynolds number and jet-to-target separation distance) have been  investigated. The Yap correction is applied for reducing the over-prediction  of Nusselt number in the near wall region. It is shown that among the models  tested in this study, the LS-Yap model is capable of predicting local Nusselt  number in good agreement with the experimental data in both stagnation and  wall jet region. Moreover, after implementation of Yap correction, no  significant effect of the nozzle-to-surface distance, h/B, on the predicted  stagnation Nusselt number has been found. Finally it is demonstrated that the  higher values of turbulent Prandtl number reduces the heat diffusion along  the wall and consequently the predicted local Nusselt number is reduced  especially in the wall jet region.