The effect of orientation of square perforations on the heat transfer enhancement from a fin subjected to natural convection

AlEssa, Abdullah H. M.; Al-Hussien, Fayez M. S.

doi:10.1007/s00231-003-0450-z

Cited by 28 publications

(19 citation statements)

References 8 publications

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“…The extended surface technology has wide applications that seek out new design ideas, including fins made of anisotropic composites, porous media, and perforated and interrupted plates [5][6][7][8][9][10]. Due to the high demand for lightweight, compact, and economical fins, the optimization of fin geometry is of great importance.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Characteristics of Grooved Fin Under Forced Convection

Dixit

Patil

2015

Heat Transfer Engineering

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Material removal from an extended surface in the form of perforations and slots is a proven technique to augment heat transfer rates with a considerable reduction in the surface weight. This work presents the outcomes of experimental investigation on heat transfer characteristics of a plate fin having grooves of various configurations on two broad faces. The experimental data pertaining to heat transfer have been collected by varying Reynolds number from 1500 to 5000, for transverse grooved, inclined grooved, V-grooved, and multi-V-grooved fin. The results of the grooved fin are compared with that of a smooth conventional fin to gauge the heat transfer performance of modified fin. The maximum enhancement in Nusselt number corresponds to the inclined groove fin, whereas the highest value of grooved fin effectiveness is obtained for the multi-Vgrooved fin. The Nusselt number correlations are presented for different fin configurations tested in this work.

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Section: Introductionmentioning

confidence: 99%

Heat Transfer Characteristics of Grooved Fin Under Forced Convection

Dixit

Patil

2015

Heat Transfer Engineering

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“…Due to the requirement for lightweight, compact and economical fins, the optimisation of fin size is important. Consequently, fins must be designed to achieve maximum heat removal with minimum material expenditure, thereby facilitating manufacture of the fin (Al-Essa and Al-Hussien, 2004). Many studies have investigated optimising fin shapes.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Natural Convection Heat Transfer from the Rectangular Fins by Circular Perforations

Doori¹

2011

Int J Automot Mech Eng

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The importance of heat transfer by natural convection in enclosures can be found in many engineering applications, such as energy transfer in buildings, solar collectors, nuclear reactors and electronic packaging. An experimental study was conducted to investigate heat transfer by natural convection in a rectangular fin plate with circular perforations as heat sinks. The patterns of the perforations included 24 circular perforations (holes) for the first fin; the number of perforations increased by eight for each fin to 56 in the fifth fin. These perforations were distributed in 6-14 rows and four columns. Experiments were carried out in an experimental facility that was specifically designed and constructed for this purpose. It was observed that the temperature along the non-perforated fin dropped from 30 to 25°C, but the temperature drop for the perforated fins was from 30 to 23.7°C at low power (6 W). The drop in temperature between the fin base and the tip increased as the diameter of the perforations increased. The temperature drop at the highest power (220 W) was from 250 to 49°C for the nonperforated fin and from 250 to 36°C for the perforated fins. The heat transfer rate and the coefficient of heat transfer increased with an increased number of perforations.

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“…[14] reported the decrease of thermal conduction resistance of pin fin due to triangular perforation, which leads to improved the heat dissipation that calculated by use variation approach, finite element techniques. Likewise, [15] applied the same technique to find the effects of the orientations of the rectangular perforations under natural convection, the results show the inclined orientation is better for low each of the thickness and thermal conductivity while the parallel orientation is better for higher thickness. Also, [16] concluded to enlarge of perforated size and increase the thermal conductivity leads to augmentation the heat transfer from the rectangular fin.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a rectangular pin fin using rectangular perforations with different inclination angles

Jasim¹,

Söylemezr²

2017

IJHT

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Perforated fins, because of their compactness, low weight and high effectiveness are widely used in heat sinks to enhance the heat transfer from electronic equipments. The innovative form of the perforated fin (with inclination angles) was considered for the rectangular pin fin. In the analytical solution, the Degenerate Hypergeometric Equation (DHE) was used as a new derivative method and then solved by Kummer's series. Also, Signum function is used to model the opposite and mutable approach heat transfer area. This article presents a combined open literature and Experimental work of various cases to validate the analytical study. Two models were perforated experimentally at the 5mm from bottom tip at a various inclination angles by using a wire cut electrical discharge machining (Wire EDM) and EDM drilling machine. The present mathematical model has good reliability according to the high agreement of the validation results about (0.33%-1.4%). It was found that use of the inclined perforation fin leads to decreased thermal resistance and improvement in the thermal performance of the pin fin by enhancing the heat transfer. Also, the optimization can be achieved by minimizing the weight and length of the pin fin based on the Multi advantages of the present model. Likewise, Entropy generation was minimized with increases the open area ratio at a certain Rayleigh number and constant heat flux.

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The effect of orientation of square perforations on the heat transfer enhancement from a fin subjected to natural convection

Cited by 28 publications

References 8 publications

Heat Transfer Characteristics of Grooved Fin Under Forced Convection

Heat Transfer Characteristics of Grooved Fin Under Forced Convection

Enhancement of Natural Convection Heat Transfer from the Rectangular Fins by Circular Perforations

Optimization of a rectangular pin fin using rectangular perforations with different inclination angles

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