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Journal of Porous Media
Impact-faktor: 1.49 5-jähriger Impact-Faktor: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

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

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v10.i8.40
pages 783-795

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

M. Er-Raki
Faculty of Sciences Semlalia, Physics Department, B.P. 2390, Marrakesh, Morocco
Mohammed Hasnaoui
University Cadi Ayyad, Faculty of Sciences Semlali
Abdelkhalk Amahmid
Faculty of Sciences Semlalia, Physics Department, UFR TMF, BP 2390, Marrakesh, Morocco
Mahmoud Mamou
National Research Council of Canada, Ottawa, Ontario, Canada, K1A 0R6
M. Bourich
Faculty of Sciences Semlalia, Physics Department, UFR TMF, BP 2390, Marrakesh, Morocco

ABSTRAKT

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.


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