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Journal of Porous Media
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ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v6.i3.60
10 pages

Effects of Temperature-Dependent Viscosity in Forced Convection in a Porous Medium: Layered-Medium Analysis

RÉSUMÉ

The effects of variation of the viscosity with temperature, on quasi-fully developed forced convection in a parallel-plate channel with a saturated porous medium, is investigated analytically on the basis of a Darcy or Hazen-Dupuit-Darcy model, for the case of isoflux boundaries, using a three-layer approximation. For the case of a fluid whose viscosity decreases with temperature, it is found that the effect of the variation is to reduce/increase the Nusselt number for cooled/heated walls. For the case of small Darcy number the effect of viscosity variation is almost independent of the Forchheimer number, while for the case of large Darcy number the effect of viscosity variation is reduced as the Forchheimer number increases.


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