Numerical Analysis of Natural Convection in a Concentric Trapezoidal Enclosure Filled with a Porous Medium

Olayemi, Olalekan Adebayo and Isiaka, Muhammed and Al-Farhany, Khaled and Alomari, Mohammed Azeez and Ismael, Muneer A. and Oyedepo, Sunday Olayinka (2022) Numerical Analysis of Natural Convection in a Concentric Trapezoidal Enclosure Filled with a Porous Medium. International Journal of Engineering Research in Africa, 61. pp. 129-150. ISSN 1663-4144

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Abstract

The natural convection around a heated trapezoidal block of different sizes positioned centrically in a larger trapezium has been investigated numerically. The annulus between the trapeziums is occupied by porous media. The sides of the inner trapezium are heated to a fixed temperature and the slanted walls of the outer trapezium are isolated thermally. In contrast, its upper and lower walls are heated uniformly. The pertinent dimensionless equations were solved with COMSOL Multiphysics 5.6. The parameters considered are modified Rayleigh number, Darcy number, and area ratio. The results of this study are shown as isothermal contours, stream functions, and average Nusselt number. The results show that increasing the modified Rayleigh number improves heat transfer; however, the response of the thermal profiles to area ratio increment depends on the range of Darcy number considered. This study finds application in ingot treatments and microchannel cooling, among others.

Item Type:	Article
Uncontrolled Keywords:	Darcy number, Modified Rayleigh number, Natural convection, Porous medium
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	AKINWUMI
Date Deposited:	15 Nov 2022 15:05
Last Modified:	15 Nov 2022 15:05
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/16449

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