Effects of particles deposition on thermal performance of a convective-radiative heat sink porous fin of an electronic component

Oguntala, George; Abd‐Alhameed, Raed A.; Sobamowo, M. G.; Eya, Nnabuike N.

doi:10.1016/j.tsep.2017.10.019

Cited by 27 publications

(14 citation statements)

References 16 publications

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“…This is because the fin fouled efficiency is greater than the fin clean efficiency, which is a result of increased temperature uniformity and higher driving temperature in the fouled fin than the clean fin. In Table , the temperature comparison of the present study, Chebyshev spectral collocation method (CSCM), and established Runge–Kutta with shooting method (RKSM) result is presented. From Table , the result of the present work, with the established result of CSCM and RKSM shows a high level of agreement, which validates the accuracy of DTM for the present problem.…”

Section: Resultsmentioning

confidence: 99%

“…Shen et al applied the decoupling method to test the fouling thermal resistance using the variations of liquid velocity and heat flux. Oguntala et al numerically investigated the effect of particle fouling and performance of a porous fin heatsink. Souza et al applied differential and mechanical energy balances to investigate cooling water systems under the influence of fouling.…”

Section: Introductionmentioning

confidence: 99%

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Effects of particle fouling and magnetic field on porous fin for improved cooling of consumer electronics

2019

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The combined effect of particulate fouling and magnetic field on the efficiency of a convective-radiative porous fin heatsink with temperature-dependent thermal conductivity is presented. The developed thermal models are solved using differential transformation method. The effects of thermal conductivity, porosity, convection, radiation parameter, and thermal fouling number on the fin thermal efficiency are investigated. The presence of thermal fouling on the surface of the fin is shown to increase the temperature distribution. The presence of particle deposition on the fin surface significantly decreases the rate of heat transfer as additional thermal resistance of the fouling layer decreases the thermal performance of porous fin heatsink. Moreover, the fin efficiency decreases as the value of fouled Biot, Darcy, radiation number, and thermogeometric parameter increases. It is established that M f < M c , which indicates that the efficiency of the fouled fin is greater than the efficiency of the clean fin. Furthermore, the result of the present study is validated with the established results of Chebyshev spectral collocation method and fourth-order Runge-Kutta with shooting method and an error margin of 0.000000023 is established.K E Y W O R D S differential transformation method, particle fouling, porous fin, thermal analysis

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of particle fouling and magnetic field on porous fin for improved cooling of consumer electronics

2019

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“…It was noticed that the rate of heat transfer reduced because of particle deposition on the fin and heat transfer rate was totally dependent on particle density and particle size as well as the flow rate of cold air. Again Oguntala et al 95 in another research study observed that increment in fouled Biot, Darcy, and radiation numbers causes the decrement of fin efficiency. Moreover, the thermogeometric parameter of the fin goes down as the fin efficiency increases.…”

Section: Analytical Studiesmentioning

confidence: 89%

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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“…Chebychev spectral collocation method (CSCM) is applied in this work. The basic definition of the method and its detailed procedures can be found in our previous publications [20]. Making a suitable transformation to map the physical domain [0, 1] into a computational domain [-1,1], we have:…”

Section: Modelling Of Surface Roughnessmentioning

confidence: 99%

Investigation of Simultaneous Effects of Surface Roughness, Porosity, and Magnetic Field of Rough Porous Microfin Under a Convective–Radiative Heat Transfer for Improved Microprocessor Cooling of Consumer Electronics

Oguntala

Sobamowo

Eya

et al. 2019

IEEE Trans. Compon., Packag. Manufact. Technol.

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The ever-increasing demand for high-processing compact electronic systems has unequivocally called for improved microprocessor performance. However, increasing microprocessor performance requires increasing power and onchip power density, both of which are associated with increased heat dissipation. Electronic cooling using fins have been identified as a reliable cooling approach in miniaturized electronic systems. However, an investigation into the thermal behaviour of fin would help in the design of miniaturized, effective heatsinks for reliable microprocessor cooling. The aim of this paper is to investigate the simultaneous effects of surface roughness, porosity and magnetic field on the performance of a porous micro-fin under a convectiveradiative heat transfer mechanism. The developed thermal model considers variable thermal properties according to linear, exponential and power laws, and are solved using Chebychev spectral collocation method. A parametric study is carried out using the numerical solutions to establish the influences of porosity, surface roughness, and the magnetic field on the microfin thermal behaviour. The results of the simulation establish that thermal efficiency of the micro-fin is significantly affected by the porosity, magnetic field, geometric ratio, nonlinear thermal conductivity parameter, thermo-geometric parameter and the surface roughness of the micro-fin. Furthermore, the study establishes that the fin efficiency ratio which is the ratio of efficiency of the rough fin to the efficiency of the smooth fin is found to be greater than unity when the rough and smooth fins of equal geometrical, physical, thermal and material properties are subjected to the same operating condition. He is currently pursuing his PhD degree in Electrical Engineering at the University of Bradford, UK. His research interests include computational analysis, multi-user multi-service security, mobility management, network security, cryptography and information privacy.Raed Abd-Alhameed (M'02, S'13) is Professor of Electromagnetic and Radio Frequency Engineering at the University of Bradford, UK. He has long years' research experience in the areas of Radio Frequency, Signal Processing, propagations, antennas and electromagnetic computational techniques, and has published over 500 academic journal and conference papers; in addition, he is co-authors of four books and several book chapters. At the present he is the leader of Radio Frequency, Propagation, sensor design and Signal Processing; in addition to leading the Communications research group for years within the School of Engineering and Informatics, Bradford University, UK.

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Effects of particles deposition on thermal performance of a convective-radiative heat sink porous fin of an electronic component

Cited by 27 publications

References 16 publications

Effects of particle fouling and magnetic field on porous fin for improved cooling of consumer electronics

Effects of particle fouling and magnetic field on porous fin for improved cooling of consumer electronics

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

Investigation of Simultaneous Effects of Surface Roughness, Porosity, and Magnetic Field of Rough Porous Microfin Under a Convective–Radiative Heat Transfer for Improved Microprocessor Cooling of Consumer Electronics

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