Enhancement of natural convection heat transfer from a fin by triangular perforation of bases parallel and toward its tip

AlEssa, Abdullah H. M.; Al‐Widyan, Mohamad I.

doi:10.1007/s10483-008-0807-x

Cited by 39 publications

(19 citation statements)

References 9 publications

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“…The number of perforations also becomes the main feature in increasing the perforation to the plate fin. Al-Essa and Al-Odat [9] examined the effect of triangular perforations on the heat transfer performance of a plate fin exposed to natural convection. They confirmed that they had optimum drilling size and optimum gap values.…”

Section: Introductionmentioning

confidence: 99%

Natural convection from perforated vertical fins with different hole diameters

TAHA¹,

Ateş²,

Altun³

et al. 2018

International Journal of Energy Applications and Technologies

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Natural convection is a physical mechanism that is mostly benefited in cooling of electronics. Due to the variety of the geometrical and operational parameters, industrial and scientific studies are continuing for better performance. One of the focuses is on perforations of heat sink fins as a passive flow control technique. This work experimentally investigates a sinusoidal wavy fin heat sink after fins were perforated with two different hole diameters. Heat sink was heated by using an electrical resistance for six different heating powers. The temperature at the heater-heat sink interface was measured with the aid of four thermocouples. Transient and steady temperature values were measured and then recorded by means of a data-logger. The details of the experimental setup are given alongside of visuals. It is desired to state some assessment and evaluations about the experimental setup. Related literature studies are also summarized in the introduction section. Heat transfer, Rayleigh and Nusselt numbers were calculated and compared with each other and parameters by means of 2D plot graphics. The time for reaching steady state is changing between 1.5 to 2 hours. Average wall temperature changes linearly with heating power. Average wall temperature values are between 300 and 350 Kelvin. Nusselt number decreases with increasing Rayleigh number. While Rayleigh number changes between 500,000 to 2,000,000, Nusselt number decreases from 425 to 250. It is concluded that increasing perforation hole diameter slightly increases convection heat transfer. Some remarks for the future work is given in conclusion section.

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Section: Introductionmentioning

confidence: 99%

Natural convection from perforated vertical fins with different hole diameters

TAHA¹,

Ateş²,

Altun³

et al. 2018

International Journal of Energy Applications and Technologies

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“…The effects of perforating plate fins for natural convection heat transfer has also been considered in a number of previous studies. Alessa and Al-Widyan [33], Alessa et al [34] and…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of the thermal-hydraulic characteristics of perforated plate fin heat sinks

Al-Sallami

Al‐damook

Thompson

2017

International Journal of Thermal Sciences

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The benefits of using notch, slot and multiple circular perforations in plate fin heat sinks (PFHSs), are investigated numerically, using a conjugate heat transfer model. Comparisons show that each type of perforation can provide significantly reduced pressure drops over PFHSs but that fins with slot perforations provide the most effective design in terms of heat transfer and pressure drop. The practical benefits of each type of perforated fin for microelectronics cooling is also explored and their capabilities of achieving low processor temperatures for reduced mechanical power consumption are quantified.

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“…They have shown different flow patterns are dependent on fluid flow rates. AIEssa and colleagues studied the heat dissipation from a horizontal rectangular fin with square perforation, rectangular perforations with an aspect ratio of two, equilateral triangular perforations of bases parallel and towards its fin tip by using the finite element technique under natural convection. They compared results between the perforated fin and its external dimensionally equivalent solid fins.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Design Parameters for Lateral Circular Perforated Fin Arrays under Forced Convection

Dhanawade

Sunnapwar

Dhanawade³

2014

Heat Trans. Asian Res.

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Heat dissipation is an important issue in compactness and weight of equipment. Heat dissipaters are not only chosen for their thermal performance but also for other design parameters such as weight, cost and reliability depending on applications. The present paper reports an experimental study to investigate the heat transfer enhancement over vertical rectangular fin arrays equipped with lateral circular perforations. The cross‐sectional area of the rectangular duct was 200 mm × 80 mm. The data used in performance analysis were obtained experimentally for aluminum at 200 Watts heat input, by varying the fin thickness, size of perforations and varying Reynolds number range 2.1 × 104 to 8.7 × 104. Using the Taguchi experimental design method, optimum design parameters and their levels were investigated. Average Nusselt number was considered as a performance characteristics. An L9 (33) orthogonal array was selected as an experimental plan. Optimum results were found by experimenting with porosity, Reynolds number and thickness of the fin. It is observed that the Reynolds number and maximum porosity have a larger impact on Nusselt number.

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Enhancement of natural convection heat transfer from a fin by triangular perforation of bases parallel and toward its tip

Cited by 39 publications

References 9 publications

Natural convection from perforated vertical fins with different hole diameters

Natural convection from perforated vertical fins with different hole diameters

A numerical investigation of the thermal-hydraulic characteristics of perforated plate fin heat sinks

Optimization of Design Parameters for Lateral Circular Perforated Fin Arrays under Forced Convection

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