Natural convection cooling process from two identical porous‐covering electronic components

Bouchair, Rabah; Bourouis, Abderrahim; Omara, Abdeslam

doi:10.1002/htj.22377

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…5show a good agreement between our results and those of Tahmasbi et al [33]. Besides, other comparisons were performed to validate the precision of our FORTRAN computer code in simulating either mixed or natural convection in composite domains which can be found in our previous works ( [40,41]).…”

Section: Numerical Analysissupporting

confidence: 82%

Mixed convection air-cooled PV/T solar collector with integrate porous medium

Boulhidja,

Bourouis,

Boukelia

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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Hybrid photovoltaic thermal PVT solar collectors are a good option to produce electrical power and thermal energy simultaneously from solar radiation, where the transfer uid circulating in this system works as a coolant, and at once, it gains additional heat to produce heat. This study is based on a numerical investigation, and aims to improve the performances of a hybrid photovoltaic thermal (PVT)collectorby using porous media, and taking into account the air buoyancy force effect (i.e., natural convection effect).For this purpose, the impacts of panel tilt angle (α), Richardson number (Ri), thickness of the porous layer (Ep) and Darcy number (Da) on the PVT system performances including its velocity contours, thermal eld, thermal and electrical e ciencies are examined. The obtained results showed that by taking into account the buoyancy force, an enhancement in both electrical and thermal e ciencies is observed which can reach up 9.88% and 10% respectively if the PVT is erected without porous layer. Moreover, in the case of the buoyancy force is neglected, the integration of porous media under speci c values of the studied parameters can enhance both electrical and thermal e ciencies by more than 26% and 38%, respectively compared to the classic layout of the PVT system.

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Section: Numerical Analysissupporting

confidence: 82%

Mixed convection air-cooled PV/T solar collector with integrate porous medium

Boulhidja,

Bourouis,

Boukelia

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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“…This approach is limited within the context of staggered grid-based computation. This investigation can be expanded by integrating heated fins around porous layers, as this modeling approach proves beneficial for cooling electronic cabinets, as highlighted by Bouchair et al. (2022).…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method

Algehyne

2024

HFF

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Purpose In recent times, there has been a growing interest in buoyancy-induced heat transfer within confined enclosures due to its frequent occurrence in heat transfer processes across diverse engineering disciplines, including electronic cooling, solar technologies, nuclear reactor systems, heat exchangers and energy storage systems. Moreover, the reduction of entropy generation holds significant importance in engineering applications, as it contributes to enhancing thermal system performance. This study, a numerical investigation, aims to analyze entropy generation and natural convection flow in an inclined square enclosure filled with Ag–MgO/water and Ag–TiO2/water hybrid nanofluids under the influence of a magnetic field. The enclosure features heated slits along its bottom and left walls. Following the Boussinesq approximation, the convective flow arises from a horizontal temperature difference between the partially heated walls and the cold right wall. Design/methodology/approach The governing equations for laminar unsteady natural convection flow in a Newtonian, incompressible mixture is solved using a Marker-and-Cell-based finite difference method within a customized MATLAB code. The hybrid nanofluid’s effective thermal conductivity and viscosity are determined using spherical nanoparticle correlations. Findings The numerical investigations cover various parameters, including nanoparticle volume concentration, Hartmann number, Rayleigh number, heat source/sink effects and inclination angle. As the Hartmann and Rayleigh numbers increase, there is a significant enhancement in entropy generation. The average Nusselt number experiences a substantial increase at extremely high values of the Rayleigh number and inclination. Practical implications This numerical investigation explores advanced applications involving various combinations of influential parameters, different nanoparticles, enclosure inclinations and improved designs. The goal is to control fluid flow and enhance heat transfer rates to meet the demands of the Fourth Industrial Revolution. Originality/value In a 90° tilted enclosure, the addition of 5% hybrid nanoparticles to the base fluid resulted in a 17.139% increase in the heat transfer rate for Ag–MgO nanoparticles and a 16.4185% increase for Ag–TiO2 nanoparticles compared to the base fluid. It is observed that a 5% nanoparticle volume fraction results in an increased heat transfer rate, influenced by variations in both the Darcy and Rayleigh numbers. The study demonstrates that the Ag–MgO hybrid nanofluid exhibits superior heat transfer and fluid transport performance compared to the Ag–TiO2 hybrid nanofluid. The simulations pertain to the use of hybrid magnetic nanofluids in fuel cells, solar cavity receivers and the processing of electromagnetic nanomaterials in enclosed environments.

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Free convection of Ostwald-de Waele fluid within square enclosure equipped with heat-generating circular solid: MRT-LBM simulation

Boutra

Bourada

Benkahla

2023

Journal of the Taiwan Institute of Chemical Engineers

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Natural convection cooling process from two identical porous‐covering electronic components

Abstract: In the present work, we focus to study numerically the natural convection cooling process from two identical electronic components located on the bottom wall of a two-dimensional cavity. Each electronic component is covered by a porous medium with finite thickness. The

Cited by 5 publications

References 32 publications

Mixed convection air-cooled PV/T solar collector with integrate porous medium

Mixed convection air-cooled PV/T solar collector with integrate porous medium

Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method

Free convection of Ostwald-de Waele fluid within square enclosure equipped with heat-generating circular solid: MRT-LBM simulation

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