Numerical Investigation and Comparative Analysis of Multi Jet Impingement Cooling System with Optimized Heat Sinks

Abstract

In this study, a multi-jet array cooling device with different heat sink configurations has been proposed and optimized. The coupled effect of design parameters of jet impingement on heat transfer was studied and the usefulness of optimization schemes in the design of multi-jet manifolds and heat sinks was explored. A numerical approach using commercial CFD software Star-CCM+ was implemented and several numerous cases were simulated to understand the effects of each parameter (jet diameter, impingement height, heat sink parameters, and outlet height, among others) on heat transfer characteristics. Gradient-based and Heuristic optimization techniques were used to find the optimum design for conical pin heatsink and upper manifold configuration. Topology optimization was also used on the optimal design to further enhance the heat transfer characteristics. Various designs of heat sinks were explored and compared with the base case (flat plate). Numerical results were compared with the experimental data and validated for different flow and heat flux conditions. Water was used as the working fluid both in the computational simulations and the experiments. The lowest thermal approach of 0.04 K/W was achieved at a volumetric flow rate of 2000 ml/min with a pumping power of 30 mW