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Validation de l'hypothèse concernant l'équilibre thermique local de la convection naturelle d'une plaque verticale encastrée dans un milieu poreux : le modèle non Darcien.

Validation of the local thermal equilibrium assumption in natural convection from a vertical plate embedded in a porous medium: non-Darcian model.

Auteurs : HADDAD O. M., NIMR M. A. al-, KHATEEB A. N. al-

Type d'article : Article

Résumé

The validity of the local thermal equilibrium assumption in natural convection over a vertical flat plate embedded in a porous medium was investigated analytically. The study was based on the two-phase (Schumann) model, using the Brinkman term (no-slip condition) to cover the flow. It was found that there are four dimensionless parameters controlling the local thermal equilibrium assumption: the volumetric Biot number, the modified Rayleigh number, the modified Darcy number and the ratio of effective to dynamic viscosity. The effects of these parameters were investigated and a correlation equation was developed in order to determine the region where the local thermal equilibrium assumption is valid.

Détails

  • Titre original : Validation of the local thermal equilibrium assumption in natural convection from a vertical plate embedded in a porous medium: non-Darcian model.
  • Identifiant de la fiche : 2004-2145
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 47 - n. 8-9
  • Date d'édition : 04/2004

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