Numerical validation of natural convection heat transfer with horizontal rectangular fin array using straight knurling patterns on fins—correlation for Nusselt number

Chikurde, Rahul C.; Kothavale, B. S.; Sane, N. K.

doi:10.1002/htj.21449

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…24 In the work, they observed that a triangular microchannel heat sink is effective with more rate of cooling per unit fin volume. 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 triangularedged 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.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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A heat sink is a thermal management system for electrical and electronic appliances whose performance is a function of fin geometry, arrangement, and flow field. Earlier research addressed the enhancement in the heat dissipation capacity of the sink with a change in the geometry of the fin. However, the change should increase the heat transfer rate per unit weight and per unit volume. One such attempt is made in the present work, which deals with numerical forced convection heat transfer simulation over a pin fin with three different surface modifications, namely, threads, equilateral triangular perforation, and threads with perforations. A numerical investigation is performed for 0.5773–2.5574 mm pitch of threads, 3–4.8 mm size of perforation, and 2–8 m/s velocities of air. To describe the flow pattern around the fin and its variation with surface modification, streamline profiles are drawn which reveals that the fluid–solid interaction is improved either with threaded or perforated surface and is maximum for threaded–perforated fin. The enhanced convection rates bring down the local fin temperature and the maximum fin temperature, where the drop is more for the threaded surface than that of the perforated surface because of turbulence. A 10° drop in maximum fin temperature is achieved by replacing a plain pin fin with a threaded–perforated pin fin, and the drop is 8° with threads alone and 6° only with perforations. The increased fineness of threads and size of perforation further bring down the maximum fin temperature.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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Study on Optimization of Copper to Aluminum for Locomotive Finned Tube Radiator

2023

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The influence of the improvement of the finned tube radiator unit structure on the fluid flow and heat transfer effect of the locomotive was studied. A saw-toothed fin structure with aluminum instead of copper was proposed to keep the position and size of the flat copper hot water pipe unchanged. CFD simulation analysis was carried out by ICEPAK17.0, under the conditions of an ambient temperature of 24.6 °C, atmospheric pressure of 85,040 Pa and air density ρ = 0.94 kg/m3, to compare the changes of velocity field, temperature field, turbulence field and field synergy angle. The sawtooth structure of the new heat sink increases the turbulence effect of the fluid, reduces the thickness of the outer boundary layer of the water pipe, and strengthens the heat transfer effect of the radiator. Finally, the baffle height, wing window width and sawtooth angle of the sawtooth structure were selected, and the heat transfer coefficient and pressure under three conditions of low, medium and high were used as indexes to analyze the influence of each parameter on the performance of the radiator. The results show that the heat dissipation effect of the serrated aluminum sheet is higher than that of the copper sheet, the heat transfer coefficient is increased by about 1.3%, the average pressure is reduced, the turbulence performance is improved, the synergy angle is reduced by about 2.3°, and the new radiator has better performance. The fin factor has the greatest influence on the heat transfer coefficient and the least influence on the pressure. When the baffle is about 0.15 mm high, the heat transfer coefficient is the largest, and the height change has the highest effect on the pressure. The included Angle factor has the least influence on the heat transfer effect, and the influence on the pressure is higher. By changing the fin window structure, the thermal performance of the finned tube radiator can be improved.

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Numerical validation of natural convection heat transfer with horizontal rectangular fin array using straight knurling patterns on fins—correlation for Nusselt number

Cited by 2 publications

References 15 publications

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

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

Study on Optimization of Copper to Aluminum for Locomotive Finned Tube Radiator

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