Numerical analysis of heat transfer enhancing parameters on impinging air jets

Abstract

Impinging air jets are widely used in industry for heating, cooling and drying. Single and multiple impinging air jets provide the best configuration for convective heat and mass transfer to a surface. In this study, the convection air jets were examined numerically. Air velocity (12, 23 and 35 m/s), geometry dimensions (H/D distance= 4, 6, 8, 10, 12), number of nozzles (single and double) and the distance between nozzles (n = 50, 75, 100) were selected as parameters. For single nozzle, the most efficient condition was seen in H/D=10 and the highest Reynolds number. It was determined that the efficiency of heat transfer after H/D=10 has decreased for single nozzle. The most efficient heat transfer for the double nozzle was obtained for the 12114 of Reynolds number and H/D=8. In this study, a numerical approach is presented to find an optimum solution for cooling problems in the electronics industry.