Predictions of turbulent heat transfer in an axisymmetric jet impinging on a heated pedestal

Cooling or hearing of a flat plate by art impinging jet, due to its many applications has been widely studied. Recent experimental data concerning more complex geometries has become available. In this study, the cooling of a heated pedestal mounted on a flat plate, a configuration which is closer to the one met in some engineering applications (e.g., cooling of electronic components), has been numerically simulated. The normal velocity relaxation turbulence model (V2F model) in art axisymmetric geometry has been adopted. Results have been obtained for a range of jet Reynolds numbers and jet-to-pedestal distances. Comparison of the predicted heat transfer coefficient with experiments has shown a very good agreement For comparison, results have also been obtained with the widely used k-is an element of turbulence model and the agreement with the data is poor.