INVESTIGATION ON FORCED CONVECTION HEAT TRANSFER PERFORMANCE OF WAVY FIN HEAT SINK

Improving heat sink heat transfer efficiency is essential for the development of high-performance microelectronics. Although wavy-fin heat sinks have gained significant attention as high-efficiency heat dissipation components, the influence mechanisms of their geometric parameters on heat transfer characteristics remain insufficiently studied and theoretically explained. Hence, this paper analyzes the geometric parameters and heat transfer performance of a tangential circular arc wavy-fin heat sink to investigate their mutual influence mechanism. The novelty of this study lies in the development of a numerical model for this tangential arc segment heat sink, and the feasibility of the model is verified through experiments under different Reynolds numbers. This study simulates 10 different radiators with the same total heat dissipation area, investigates the effects of central angles and arc segment numbers on the heat transfer coefficient and pressure drop of wavy-fin radiators within the Reynolds number range of 500 to 3000, and establishes relevant response equations for discussion. Key research results demonstrate that, compared with traditional straight-finned heat sinks, the wavy-fin heat sink can reduce the temperature by up to 13.64 K. Regression equations indicate that the heat sink exhibits optimal performance at a central angle of approximately 53°. Moreover, the central angle significantly affects both the heat transfer coefficient and pressure drop, whereas the number of arc segments has a relatively minor effect on the pressure drop. These research findings demonstrate that integrating wavy-fin radiators with multiobjective optimization methods enables the development of heat dissipation devices with more superior comprehensive performance.