Optimisation for Optimum Nozzle Design of the Hybrid Jet-Pillar-Microchannel Heat Sink

The present study conducted an optimisation study for geometric variables of the jet nozzle of the multi-jet impingement and pillar-integrated microchannel heat sink for best performance. Nozzle diameter, nozzle angle, and nozzle diameter decreasing factor are the three design variables and minimisation of the thermal resistance is considered as the objective function. A regression model is developed using Minitab software and optimised using response surface methodology and further contribution of each variable is observed by performing analysis of variance. Nozzle angle exhibited the maximum contribution in varying the objective function that is 47.84% and thus thermal resistance was reduced by 15.8% by changing the nozzle angle from optimum conditions.