Thermo-hydraulic performance of modified plate fin and pin fin heat sinks

Abstract

Extended surfaces are widely investigated for their ability to enhance the heat transfer rates in different applications. Pin-fin and plate-fin heat sinks are used in a variety of cases involving a miniaturized to the large systems. The present study compares the performance of the pin-fin and the plate-fin heat sink under similar forced flow conditions. The experimental data for a modified pin fin heat sink with wings and a plate-fin heat sink with dimples are collected for the Reynolds number in the range of 6800–15100. The Nusselt number, friction factor, and thermo-hydraulic performance (THP) are examined for different geometries of the heat sink and the enhancements brought out in the heat transfer and friction are gauged relative to the smooth plate. The pin fin heat sink yields two-fold enhancement in heat transfer as compared to the plate-fin heat sink. The maximum thermo-hydraulic performance of the pin-fin heat sink with wings is found to be 4.52 at a pitch ratio (S/Df) of 2 and Wing length ratio (Lw/Df). For the plate fin heat sink with dimples, the maximum thermo-hydraulic performance is found to be 4.67 at dimple diameter ratio (D/d) of 0.5 and dimple pitch ratio (s/d) of 2.5. The correlations of the Nusselt number and friction factor are proposed for different geometries of fins.

Comparison of Forced Convective Heat-Transfer Enhancement of Conventional and Thin Plate-Fin Heat Sinks under Sinusoidal Vibration

“…The application of conventional plate-fin heat sink is popular due to their advantages of being simple to design and fabricate [3]. Recent studies have proposed conventional plate-fin designs, including cross-fin arrangements [4], wavy [5,6] or Y-shaped plate fins [7], radial plate fins [8], combinations of plate and pin fins [9,10], plate fins with fillets [11,12], slots [13][14][15], dimples [16], and rods [17].…”

Performance Enhancement of Double-Layer Microchannel Heat Sink by Employing Dimples and Protrusions on Channel Sidewalls

“…e heat transfer coefficient was found with the hike of 50% for the optimum fin density. An extensive experimental investigation was carried out by Patil et al [19] to study the conventional heat sink channel configured with a pin fin and plate fin. Effects of different geometrical parameters of pin fin and plate fin were determined.…”