Abstract
AbstractPassive cooling is a widely preferred method for the thermal management of electronic devices as it is quiet in operation, cost-effective and offers high reliability. Heat sinks with extended surfaces have been widely used in free convection applications. Fins with square cross sections are the most preferred ones for heat sink construction, due to the ease of manufacturing. The geometric optimization of extended surfaces in the aforementioned applications is based on two approaches: (a) minimizing mass or volume for the prescribed heat dissipation and (b) maximizing heat dissipation for the prescribed mass or volume. In this study, steady-state natural convection from vertically placed rectangular fin heat sink is analyzed numerically. Geometrical modifications are done in the existing plate fin heat sink by introducing rows of square pin fins in between plate fins to improve its thermal performance. A maximum reduction of 7.1% is observed in the average baseplate temperature of the plate square pin fin heat sink at 125 W.KeywordsPlate finsCooling techniqueThermal managementHeat sinksRayleigh number
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