Optimizing Fluid Flow to Enhance the Hydrothermal Performance of Multi‐Mini‐Channel Heat Sinks

ABSTRACT Minichannel heat sinks (MCHSs) are an effective solution for dissipating high heat flux due to their excellent convective heat transfer and low pressure drop. Improving the hydrothermal performance of these heat sinks is essential to meet the high heat flux requirements. This paper aims to study the behavior of fluid flow splitting on the hydrothermal performance of a multi‐mini‐channel heat sink using a numerical approach. Two models, Models A and B, are analyzed and their performances compared. Numerical results demonstrate that the flow splitting area through the MCHS is a critical factor in improving its thermal and hydraulic performance. All models were designed with a single inlet and outlet and simulated using ANSYS Fluent three‐dimensional software. The findings show that applying the flow splitting strategy resulted in a significant increase in heat transfer efficiency, with a 40.96% increase in Nusselt number compared with the conventional design. Model A also demonstrates a superior overall performance factor of 1.43, confirming the effectiveness of the proposed design in improving the hydrothermal performance compared with the standard arrangement.