Abstract
This study investigates numerically, with experimental verification, the performance of a hybrid multilayer microchannel heat sink with jet impingement. The three-dimensional fluid flow and heat transfer processes were solved using the finite volume method using Fluent CFD Solver. The surface temperature distribution and pressure drop across the system were monitored under a range of designs and operating conditions including different flow rates, channel aspect ratios, jet spacings, and distribution of the flow rate between the jets and the channels. Our results show that increasing the number of jets minimizes the pressure drop, yet, results in higher surface temperatures. Increasing channel height decreased the pressure drop and enhanced the temperature uniformity. Using a double-layer heat sink instead of a single-layer one resulted in a decrease of 7.5% in surface temperature with a considerable reduction in pressure drop. Nevertheless, adding copper fins/posts in the lower channel layer is essential to help conduct the heat to the top layer and improve the heat removal rate. We also studied dividing the total flow rate between the jets and the main cooling channel and found that it can reduce the average temperature on the hot surface even though it did not improve the temperature uniformity. We verified our simulation results with experimental measurement for a single-layer hybrid heat sink with jet impingement and results matched with a temperature difference below 5 °C. Based on our simulations, the DL-hybrid module can remove high heat fluxes while maintaining an acceptable pressure drop.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call