The Optimization of Hollow Hybrid Fin Heat Sinks under Impinging Airflows

The study herein describes the design optimization of the hollow hybrid fin heat sink (HHFHS) using a numerically developed Nusselt number correlation. The hollow hybrid fin is a hollow pin fin with a perforation near the base and radially extruded plate fins. The correlation was based on the geometric and flow parameters of the HHFHS under impinging airflows. The optimization utilizes the correlation for hundreds of HHFHS geometric combinations of number of fins, fin diameter, plate fin width, and fin height. Two approaches are used for determining the optimal HHFHS design. One approach finds the lowest thermal resistance for the predefined range of the mass. The other approach is to multiply the thermal resistance and the mass to find the design parameters with the best mass-based performance.