Thermal performance of center-cleared hollow cylindrical pin-fin heat sink for electronic cooling

The heat generated by electronic components can lead to the failure of the system, so an efficient cooling system is needed. The present study introduces a novel approach to analyze the impact of design parameters on the performance of pin–fin heat sinks under varying input heat loads. This work aims to numerically investigate the thermal performance of center-cleared pin-fin heat sinks (PFHS) under natural convection. PFHS having solid, hollow, and perforated hollow cylindrical fins were investigated under varied power input in the range of 2.15–10.75 W. Solid cylinder PFHS showed least thermal resistance of 6.87 K W⁻¹ and the lowest base temperature of 41.11 ºC corresponding to the power input of 10.75 and 2.15 W, respectively. The maximum effectiveness of 3.3 corresponds to solid cylinder PFHS at 4.3 W. The maximum volumetric heat dissipation is observed in case of a hollow cylinder PFHS, and minimum value of (R_th m) is found for the perforated hollow cylinder PFHS.