Numerical analysis of turbulent round jet impingement heat transfer at high temperature difference

• Validation of the V2F turbulent model is performed.
• Effect of the density and thermal properties on heat transfer is quantitatively studied.
• Modified correlations for impingement heat transfer at high temperature difference.

Heat transfer of round jet impingement at high temperature difference was numerically investigated with V2F turbulent model. Validation of the model was evaluated against available experimental data. Effect of the density and thermal properties on heat transfer was studied. Numerical results show that the decrease of density leads to decrease of the heat transfer coefficient while the increase of each thermal property leads to increase of the heat transfer coefficient. Meanwhile, Nusselt number is found to be independent of the temperature difference and can be calculated from the correlation at low temperature difference on the condition that the jet inlet temperature is selected as the qualitative temperature. Correlation proposed by earlier researcher is then modified for impingement heat transfer at high temperature difference.