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Journal of Porous Media
Factor de Impacto: 1.49 Factor de Impacto de 5 años: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimir: 1091-028X
ISSN En Línea: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v16.i10.30
pages 903-919

NUMERICAL SOLUTION OF DOUBLE-DIFFUSIVE NATURAL CONVECTION IN A POROUS CAVITY PARTIALLY HEATED FROM BELOW AND PARTIALLY SALTED FROM THE SIDE

Anas A. Altawallbeh
Department of Basic Sciences and Mathematics, Faculty of Science, Philadelphia University 19392, Amman, Jordan
Nawaf H. Saeid
Flow Modeling and Simulation Research Cluster, Universiti Teknologi Brunei, Tungku Link, Gadong, BE 1410, Brunei Darussalam
Ishak Hashim
School of Mathematical Sciences & Solar Energy Research Institute, Faculty of Science & Technology, Universiti Kebangsaan Malaysia 43600 UKM Bangi, Selangor DE, Malaysia

SINOPSIS

Double-diffusive natural convection in a square porous enclosure is studied numerically when the bottom and right walls are partially heated and partially salted, respectively. The top wall is maintained at a constant cold temperature and the left wall is fully salted at a lower concentration than the right. The Darcy model is used in the mathematical formulation. The finite volume method is used to solve the governing equations. The governing parameters of the present study are Rayleigh number (Ra), Lewis number (Le), buoyancy ratio (N), heating segment length (lh) heating segment position (xh), concentration segment length (ls), and concentration segment position (ys). The results were discussed in the effect of these parameters on streamlines, isotherms, isoconcentration lines, and the heat- and mass-transfer processes, and presented graphically. Generally, there is a direct relation between buoyancy ratio and heat- and mass-transfer processes. The results show a significant effect of the heating and concentration segment's length and position on the heat- and mass-transfer processes. The minimum value of average Nusselt number occurs with N > 0 for all the positions of the heating segment except the positions xh > 0.1 and 0.9, where the minimum value occurs with N > 1 and − 1, respectively.


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