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Entropy 2016, 18(12), 436; doi:10.3390/e18120436

Numerical Study of Entropy Generation in Mixed MHD Convection in a Square Lid-Driven Cavity Filled with Darcy–Brinkman–Forchheimer Porous Medium

1
Chemical and Process Engineering Department, Engineers National School of Gabès, Applied Thermodynamics Unit, Gabès University, Omar Ibn El Khattab Street, 6029 Gabès, Tunisia
2
Chemical Engineering Department, High Institute of Applied Sciences and Technology, Gabès University, Omar Ibn El Khattab Street, 6029 Gabès, Tunisia
*
Author to whom correspondence should be addressed.
Academic Editor: Brian Agnew
Received: 3 October 2016 / Revised: 22 November 2016 / Accepted: 22 November 2016 / Published: 6 December 2016
(This article belongs to the Special Issue Advances in Applied Thermodynamics II)
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Abstract

This investigation deals with the numerical simulation of entropy generation at mixed convection flow in a lid-driven saturated porous cavity submitted to a magnetic field. The magnetic field is applied in the direction that is normal to the cavity cross section. The governing equations, written in the Darcy–Brinkman–Forchheimer formulation, are solved using a numerical code based on the Control Volume Finite Element Method. The flow structure and heat transfer are presented in the form of streamlines, isotherms and average Nusselt number. The entropy generation was studied for various values of Darcy number (10−3 ≤ Da ≤ 1) and for a range of Hartmann number (0 ≤ Ha ≤ 102). It was found that entropy generation is affected by the variations of the considered dimensionless physical parameters. Moreover, the form drag related to the Forchheimer effect remains significant until a critical Hartmann number value. View Full-Text
Keywords: mixed convection; cavity; porous media; entropy generation; numerical method mixed convection; cavity; porous media; entropy generation; numerical method
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Bouabda, R.; Bouabid, M.; Ben Brahim, A.; Magherbi, M. Numerical Study of Entropy Generation in Mixed MHD Convection in a Square Lid-Driven Cavity Filled with Darcy–Brinkman–Forchheimer Porous Medium. Entropy 2016, 18, 436.

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