Heat Transfer and Friction Characteristics of Perforated Fin with a Longitudinal Slot under Forced Convection

Rawat, Kuldeep; Patil, Anil Kumar

doi:10.1002/htj.21175

Cited by 2 publications

(2 citation statements)

References 15 publications

(20 reference statements)

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“…The role of conduction–convection and convection–radiation on unsteady‐state heat transfer characteristics of a fin with uniform volumetric heat generation was reported by Khan and Aziz 21 by assuming a power index for convection heat transfer coefficient, whose significance on temperature distribution, base heat flow, and surface heat loss is progressive with time. Rawat and Patil 22 reported that a slot along its length in a straight fin with perforations maximizes its heat dissipation ability but with increased pumping power requirements. While a fin without a slot and with perorations amplifies the heat transfer from it with a drop in pumping losses.…”

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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“…They found that maximum porosity and Reynolds number have an important effect on heat transfer rate. Ravat and Patil [6] studied heat transfer as well as friction factor of perforated fins subjected to forced convection. They demonstrated that heat transfer of a perforated fin is considerably higher than that of a solid one due to a reduction in energy loss.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Friction Characteristics of an Array of Perforated Fins Under Laminar Forced Convection

Nadooshan¹,

Mohammadi²,

Bayareh³

2019

Journal of Thermal Engineering

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Three-dimensional incompressible laminar fluid flow and heat transfer of a heated array of circular perforated fins are examined numerically. The Navier-Stokes and energy equations are solved by a finite volume method using the SIMPLE algorithm. The second order upwind technique is employed to discretize the momentum and energy equations. Computations were performed for a range of Reynolds numbers 100 ≤Re ≤ 350. Thermal performance and effectiveness as well as friction coefficient of perforated and solid fins are determined for the optimum porosity. The results show that the average coefficient of friction reduces with increasing the Reynolds number and the number of perforations. The heat transfer rate increases with the porosity and the Reynolds number. It is found that perforated fin effectiveness decreases with the number of peroration at constant Reynolds numbers.

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Heat Transfer and Friction Characteristics of Perforated Fin with a Longitudinal Slot under Forced Convection

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

Heat Transfer and Friction Characteristics of an Array of Perforated Fins Under Laminar Forced Convection

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