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Soret Effect on Double-Diffusive Boundary Layer Flows in a Vertical Porous Cavity

Volume 10, Numéro 8, 2007, pp. 783-795
DOI: 10.1615/JPorMedia.v10.i8.40
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RÉSUMÉ

A thorough analytical and computational investigation is performed to study the Soret effect on double-diffusive boundary layer flows in a vertical porous layer. The present investigation is focused on situations where the boundary layer scale power index (δ ∼ RmT) changes from m = −2/5 to m = −1/2, in which the Soret effect plays a central role. It is found that, depending on the Lewis number, there exist various domains in the N-SP plane where the boundary layer presents specific behaviors. In these domains, the horizontal profiles of velocity and fluid density are of boundary layer type, even though neither the temperature nor the concentration profiles exhibited a boundary layer character. For large values of Le, the thickness of the vertical boundary layer was found to increase or decrease with SP, depending on the sign of the buoyancy ratio, N. Some new correlations are derived for the boundary layer thickness scale, and the effect of the Soret coefficient is emphasized.

CITÉ PAR
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  2. Er-Raki Mohammed, Hasnaoui Mohammed, Amahmid Abdelkhalk, El Ganaoui Mohammed, Specific behaviour of thermosolutal convection induced in a vertical porous medium in the case of a separation coefficient identical to the ratio of buoyancy forces, Comptes Rendus Mécanique, 336, 3, 2008. Crossref

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  4. Aouf Zakaria, Seladji Chakib, Thermosolutal Convection in a Porous Medium Cavity Subjected to Heat and Mass Flux: A Discrete Fracture Effect, Acta Universitatis Sapientiae, Electrical and Mechanical Engineering, 12, 1, 2020. Crossref

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