Numerical investigation on heat transfer enhancement of heat sink using perforated pin fins with inline and staggered arrangement

Maji, Ambarish; Bhanja, Dipankar; Patowari, Promod Kumar

doi:10.1016/j.applthermaleng.2017.07.053

Cited by 81 publications

(16 citation statements)

References 38 publications

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“…The results revealed that the rate of heat transfer is increased along with a corresponding increment in size of the rectangular perforation and decrease in pressure drop. On the other hand, heat transfer augmentation in a perforated pin‐finned heat sink was computationally studied by Maji et al 62 Different geometrical pin fins with various perforation shapes were organized on a heat sink in both staggered and inline manners (Figure 7). Staggered arranged perforated fins show better system performance than that of fins organized in line.…”

Section: Computational Studiesmentioning

confidence: 99%

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Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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Fins or extended surfaces are generally used in heat exchangers to enhance heat transfer between the main surface and ambient fluid. Various types of simple-shaped fins, namely, rectangular, square, annular, cylindrical, and tapered, have been used with different geometrical combinations. To satisfy industrial demand, different trials have also been carried out for designing optimized fins. The optimization of fins can be performed either by enhancing heat dissipation at an exact fin weight or by diminishing the weight of the fin by precise heat dissipation. Recently a notable amount of work on some typical fins, like, porous fins and perforated fins, has also been carried out. This paper presents a brief review on heat transfer enhancement using fins of different types considering variable thermophysical and geometric parameters, which will also be useful for future use of geometrical modifications of extended surfaces, based on the cost and availability of space.analytical approach, computational approach, experimental approach, perforated fin, porous fin | INTRODUCTIONAdvanced technologies need high-performance heat transfer equipment. Techniques for enhancing the heat transfer rate are classified into two categories: active and passive methods. In the design point of view, active methods are complex as they require some extraneous power input for necessary flow adjustments and to improve the heat transfer rate and thus applications are limited. On the other hand, passive methods require geometrical or surface adjustments to the flow passage by incorporating additional devices. Additionally, by interrupting or varying the existing flow behavior (except for extended surfaces); higher heat transfer coefficients are promoted through this method, which is also followed by an increase in the corresponding pressure drop. The amount of conduction, convection, and radiation of an object shows the amount of heat it transfers. The heat transfer rate is enhanced by increasing the temperature difference between the object and the environment or by enhancing the coefficient of convective heat transfer or by maximizing the surface area of the body. In some cases, it is not appropriate or cost effective to alter the first two options. Introducing a fin to a body, however, expands the surface area and sometimes this is a cost-effective solution for heat transfer problems. Extended surfaces or fins are illustrations of passive methods that are generally used in different industrial applications for the enhancement of heat transfer between the primary surface (heat sink) and the surrounding fluid. Currently reducing the cost and size of fins is the key target of the fin industry. This demand is generally met by the high-thermal-conductivity and costly metals used to fabricate finned surfaces. Many efforts have been made to construct optimized fins. (a) By changing the size and shape of the solid fin: Instead of a longitudinal rectangular solid fin, if the geometry of fin design is changed, the performance parameters and heat tr...

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Section: Computational Studiesmentioning

confidence: 99%

“…Perforated pin fin with variation in perforation geometry and its temperature contour 62 [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Computational Studiesmentioning

confidence: 99%

Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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“…In the study by Huang et al [15], the natural convection heat transfer of a horizontal rectangular fin array was enhanced by drilling holes in the fin base. Maji et al [16] investigated the heat-transfer enhancement of heat sinks using perforated pin fins with different perforation geometries, and the results indicated that heat-dissipation rate of perforated fins was always higher than the solid ones. The perforation of fins increases the heat-dissipation rate, and at the same time, decreases the usage of materials.…”

Section: Introductionmentioning

confidence: 99%

Increasing Efficiency of a Finned Heat Sink Using Orthogonal Analysis

Cui

Cao³

et al. 2021

Energies

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As the heat flux of electronic components is increasing rapidly, the traditional air-cooling technique is gradually not meeting the requirements of thermal management. The immersion liquid-cooling technique shows great potential, and has attracted increasing attention due to its excellent performance in recent years. The finned heat sink is common and essential for cooling electric components. To analyze the influences of its structural parameters on heat dissipation and improve its efficiency while using a dielectric coolant, this study used the orthogonal analysis method to obtain the optimal structure via the numerical simulation method. The maximum temperature of the heat sink was selected as the evaluation criteria. The results showed that the parameters that affect the maximum temperature, in order of importance, are fin thickness, the number of fins, the height of the fins, and substrate thickness. Finally, taking the maximum temperature and mass as indexes obtained the optimal structure of the heat sink. The mass was reduced by 19%, while the temperature only increased by 4.5% when considering the mass index.

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“…On the other hand, although the lowest maximum temperature is observed on the Custom pin fin, the significant pressure drop precludes their use. A comparative analysis of pin fins was also performed by Maji [25]. His main goal was to reduce the pressure drop in the cooling system using this type of fins.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Air Cooling System Using Adjoint Solver Technique

Czerwiński

Wołoszyn

2021

Energies

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Air cooling systems are currently the most popular and least expensive solutions to maintain a safe temperature in electronic devices. Heat sinks have been widely used in this area, allowing for an increase in the effective heat transfer surface area. The main objective of this study was to optimise the shape of the heat sink geometric model using the Adjoint Solver technique. The optimised shape in the context of minimal temperature value behind the heat sink is proposed. The effect of radiation and trapezoidal fin shape on the maximum temperature in the cooling system is also investigated. Simulation studies were performed in Ansys Fluent software using the Reynolds—averaged Navier–Stokes technique. As a result of the simulation, it turned out that not taking into account the radiation leads to an overestimation of temperatures in the system—even by 14 ∘C. It was found that as the angle and height of the fins increases, the temperature value behind the heat sink decreases and the heat source temperature increases. The best design in the context of minimal temperature value behind the heat sink from all analysed cases is obtained for heat sink with deformed fins according to iteration 14. The temperature reduction behind the heat sink by as much as 25 ∘C, with minor changes in heat source temperature, has been achieved.

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Numerical investigation on heat transfer enhancement of heat sink using perforated pin fins with inline and staggered arrangement

Cited by 81 publications

References 38 publications

Improvement of heat transfer through fins: A brief review of recent developments

Improvement of heat transfer through fins: A brief review of recent developments

Increasing Efficiency of a Finned Heat Sink Using Orthogonal Analysis

Optimization of Air Cooling System Using Adjoint Solver Technique

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