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Titre :
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An experimental study on duoyancy-driven convective mass transfer from spheres embedded in saturated porous media
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Auteurs :
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S. Rahman
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Type de document :
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article/chapitre/communication
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Année de publication :
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1999
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Format :
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p. 487-491
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Langues:
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= Anglais
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Catégories :
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PHYSIQUE ETAT DE LA MATIERE
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Mots-clés:
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TRANSFERT DE MASSE
;
MILIEU POREUX
;
MILIEU SATURE
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Résumé :
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Buoyancy-driven convective mass transfer coefficients from copper spheres embedded saturated porous media have been experimentally obtained. Limiting diffusion current technique based on cathodic reduction of cupric ions is used. The data correspond to high Rayleigh number and, expectedly, exhibit non-Darcian effects. It is found that mass transfer from the spheres embedded in saturated porous media can be predicted by Sh(D)* = 5.609Ra(D)*(0.241)Da(-0.214), where Ra-D* and Da are modified Rayleigh number and Darcy's number respectively.
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Source :
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Heat and Mass Transfer, vol.35, n°6
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