Comprehensive thermal performance of convection–radiation longitudinal porous fins with various profiles and multiple nonlinearities

Shateri, Alireza; Salahshour, B.

doi:10.1016/j.ijmecsci.2017.12.030

Cited by 27 publications

(10 citation statements)

References 37 publications

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“…The outcome showed that the new design showed 45.3% to 48.5% reduction in pumping power, while it causes a reduction of heat transfer with 14.8% to 16.2% increase in thermal resistance for the same Reynolds number. Shateri and Salahshour 73 investigated the thermal performance of convection‐radiation longitudinal porous fins of different profiles with multiple nonlinearities. The nonlinear differential equation was solved by using the least‐squares method.…”

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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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%

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

Maji¹,

Choubey

2020

Heat Trans

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“…The convection was enhanced with the increase in the radiation parameter. Shateria and Salahshour [11] studied the temperature distribution and thermal performance of convective-radiative porous fins. They showed that the fin efficiency was improved with the increase in the conductive-radiative parameter.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis on natural-convection coupled with radiative heat transfer in a saturated porous cavity

Chen

2022

THERM SCI

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Porous foam is an ideal material for enhancing radiative heat transfer in numerous thermal equipment. The solid skeletons of porous foams can absorb/ release radiative energy and transfer convective energy with the surrounding fluid in the pores. In this paper, the conduction-convection-radiation coupling heat transfer in a porous cavity is investigated. A local thermal nonequilibrium model is used to represent the energy transport during the solid and fluid phases. The heat flux caused by thermal radiation is obtained by solving the radiation transfer equation. The thermal and fluid fields are studied to discern various parameters, including the Planck numbers Pl , the modified Rayleigh numbers Ra , and the interphase heat transfer coefficients H . Our study indicates the following: (1) the effect of radiation can be neglected when Pl > 20; (2) the modified Rayleigh numbers have little influence on the solid temperature when the radiative heat transfer is dominant and the convective heat transfer between the two phases is weak; and (3) the local thermal-equilibrium can be formed when H exhibits high values.

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“…Generalized variational iteration method is used by Miansari [34] to deal with nonlinear fin problem with radiation heat loss. Atouei uses collocation method [35], Runge-Kutta method [36] and least square method [37] to analyze temperature distribution and performance of radiative-convective semi-spherical extended surfaces. Optimal linearization method (OLM) [38] was developed to find approximate solutions for temperature field in convective and radiative heat transfers.…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Conductive-Convective-Radiative Heat Exchangers With Temperature Dependent Thermal Conductivity

Khan

Sulaiman²,

Bakar

2021

IEEE Access

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Comprehensive thermal performance of convection–radiation longitudinal porous fins with various profiles and multiple nonlinearities

Cited by 27 publications

References 37 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

Thermal analysis on natural-convection coupled with radiative heat transfer in a saturated porous cavity

Thermal Analysis of Conductive-Convective-Radiative Heat Exchangers With Temperature Dependent Thermal Conductivity

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