Thermal performance analysis of a natural convection porous fin with temperature-dependent thermal conductivity and internal heat generation

Sobamowo, M. G.; Kamiyo, O. M.; Adeleye, O.A

doi:10.1016/j.tsep.2017.02.007

Cited by 46 publications

(25 citation statements)

References 27 publications

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“…Furthermore, the results presented in Table 2 establishes the accuracy of the present method. From Table 2, we show that CSCM agrees excellently well with the established numerical results using fourth-order Runge-Kutta with shooting method and with the result of the approximate analytical method using homotopy perturbation method established in [19].…”

Section: Fin Optimizationsupporting

confidence: 77%

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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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Section: Fin Optimizationsupporting

confidence: 77%

“…The thermal conductivity of the micro-pin porous fins varies linearly as found in [19] and is given as:…”

Section: Formulation Of the Problemmentioning

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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“…They used nonlinear governing equations with the DTM to solve the distribution of temperature. Sobamowo et al 93 analyzed the thermal performance of natural convection porous fins with temperature‐dependent thermal conductivity and internal heat generation. The results showed that with the increment in porosity, Nusselt, Darcy, and Rayleigh numbers as well as the thickness‐length ratio of the fin gradually increased.…”

Section: Analytical Studiesmentioning

confidence: 99%

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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“…The development of exact analytical solutions for such nonlinear models is very difficult. Consequently, some of the past studies have developed approximate analytical solution in terms of series solutions for the thermal analyses of fins using different approximate 2 Journal of Optimization analytical methods [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Nevertheless, the series solutions involve large number of terms.…”

Section: Introductionmentioning

confidence: 99%

Optimum Design and Performance Analyses of Convective-Radiative Cooling Fin under the Influence of Magnetic Field Using Finite Element Method

Sobamowo

2019

Journal of Optimization

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In this study, the optimum design dimensions and performance analyses of convective-radiative cooling fin subjected to magnetic field are presented using finite element method. The numerical solutions are verified by the exact analytical solution for the linearized models using Laplace transform. The optimum dimensions for the optimum performance of the convection-radiative fin with variable thermal conductivity are investigated and presented graphically. Also, the effects of convective, radiative, and magnetic parameters as well as Biot number on the thermal performance of the cooling fin are analyzed using the numerical solutions. From the results, it is established that the optimum length of the fin and the thermogeometric parameter increases as the nonlinear thermal conductivity term increases. Further analyses also reveal that as the Biot number, convective, radiative, and magnetic parameters, increases, the rate of heat transfer from the fin increases and consequently improves the efficiency of the fin. Additionally, effects of the thermal stability values for the various multiboiling heat transfer modes are established. It is established that, in order to ensure stability and avoid numerical diffusion of the solution by the Galerkin finite element method, the thermogeometric parameter must not exceed some certain values for the different multiboiling heat transfer modes. It is hope that the present study will enhance the understanding of thermal response of solid fin under various factors and fin design considerations.

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Thermal performance analysis of a natural convection porous fin with temperature-dependent thermal conductivity and internal heat generation

Cited by 46 publications

References 27 publications

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

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

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

Optimum Design and Performance Analyses of Convective-Radiative Cooling Fin under the Influence of Magnetic Field Using Finite Element Method

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