Investigating the effect of various fin geometries on the thermal performance of a heat sink under natural convection

Abstract

Experimentally investigates heat dissipation by different longitudinal fins fitted to a cylindrical heat sink under natural convection conditions. Five aluminum fin configurations at base temperatures (70°C, 85°C, 100°C, and 115°C) were studied. The first fin was plain (fin1), while second fin had a triangular edge (fin2). The rest fins have the same triangular edge but with six 1cm circular perforations near the edge (fin3). While the perforations in fin4 were in the middle longitudinal fin length. The last fin (fin5) had twelve 0.5 cm circular perforations distributed into two columns. The measurements were validated with theoretical correlation with an acceptable deviation. The results showed that fin2, fin3, fin4, and fin5 dissipate more heat by 2.4%, 8.7%, 11.4%, and 5% than the flat fin with 9.8%, 11.85%, 11.85%, and 10.82% weight reduction, respectively. The heat transfer coefficient enhanced by 7.98%, 16.81%, 12.35%, and 5.44% for fin5, fin4, fin3, and fin2, respectively. Large circular perforation was more effective to dissipate heat especially when located near the heat source as in fin4 which gives the best heat dissipation with more weight reduction. The proposed fins efficiency were greater than 92%.

Comparative studies on performance of plain, perforated, threaded, and threaded–perforated pin fin: A numerical approach

“…In an experimental study on a straight fin with a knurled surface, Chikurde et al 25 concluded that the increasing depth and height of knurled surface negates the recirculation of natural convection currents, which results in enhanced heat dissipation. The experimental analysis done by Hameed et al 26 revealed that the efficiency of the radial heat sink with triangular‐edged fins, under buoyancy‐driven flow, is more than that of a plain fin heat sink, which was further increased by providing holes nearer to the base of the fin. Sarwe and Kulkarni 27 came out with an analytical solution, DTM, for solving a nonlinear ordinary differential equation governing the heat transfer from an annular fin and found a decent agreement with the conventional numerical methods to solve the same.…”

Thermal analysis of a moving fin using the radial basis function approximation

“…One of the most straightforward and efficient methods to improve the heat transfer quality is using the fins, so it is not surprising that many numerical or experimental types of research forms have been conducted in that area 1–6 . In general, fins exchange heat with their surroundings in the form of convection, radiation, conduction, or a combination of these methods.…”