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Journal of Porous Media
IF: 1.752 5-Year IF: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Print: 1091-028X
ISSN Online: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v16.i9.30
pages 811-822

NUMERICAL INVESTIGATION OF ENTROPY GENERATION FOR DOUBLE-DIFFUSIVE CONVECTION WITH SORET EFFECT IN A SQUARE POROUS CAVITY USING DARCY−BRINKMAN MODEL

Nejib Hidouri
Gabès University, Chemical and Process Engineering Department, Engineers National School of Gabès, Applied Thermodynamics Unit, Tunisia
Ali Mchirgui
Gabès University, Chemical and Process Engineering Department, Engineers National School of Gabès, Applied Thermodynamics Unit, Omar Ibn El Khattab Street, 6029 Gabès, Tunisia
Mourad Magherbi
Gabès University, Civil Engineering Department, Higher Institute of Applied Sciences and Technology, Omar Ibn El Khattab Street, 6029 Gabès, Tunisia
Ammar Ben Brahim
Gabès University, Chemical and Process Engineering Department, Engineers National School of Gabès, Applied Thermodynamics Unit, Tunisia

ABSTRACT

The objective of the present work is to numerically study the Soret effect on entropy generation in a square porous cavity saturated by a binary perfect gas mixture and submitted to horizontal thermal and concentration gradients, using the Darcy−Brinkman model. The control volume finiteelement method was used to solve the set of coupled equations of mass, momentum, energy, and species conservation. Influence of the Soret effect on the irreversibility was studied by the variation of the thermal diffusion ratio, the Darcy number, the thermal porous Rayleigh number, and the buoyancy ratio. It was found that entropy generation is driven by heat transfer, diffusion or viscous irreversibility according to thermal diffusion ratio, the buoyancy ratio, and the Darcy number values.


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