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Transfert de chaleur et de masse lors de l'évaporation d'un film liquide sur la surface d'une plaque verticale recouverte d'une couche mince et poreuse.

Heat and mass transfer for liquid film evaporation along a vertical plate covered with a thin porous layer.

Auteurs : LEU J. S., JANG J. Y., CHOU Y.

Type d'article : Article

Résumé

The purpose of this work is to evaluate the heat and mass enhancement of liquid film evaporation by covering a porous layer on the plate. Liquid and gas streams are approached by two coupled laminar boundary layers incorporated with non-Darcian modes. The numerical solution is obtained by utilizing a fully implicit finite difference method and examined in detail for the effects of porosity epsilon, porous layer thickness delta, ambient relative humidity phi and Lewis number Le on the average heat and mass transfer performance. It is shown that the heat and mass transfer performance may be enhanced by the presence of a porous layer. Both the average Nusselt and Sherwood numbers are increased with the decrease of epsilon, delta and phi. In addition, the influence of epsilon on the heat and mass transfer is significantly increased as delta is increased. [Reprinted with permission from Elsevier. Copyright, 2005].

Détails

  • Titre original : Heat and mass transfer for liquid film evaporation along a vertical plate covered with a thin porous layer.
  • Identifiant de la fiche : 2006-2218
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 49 - n. 11-12
  • Date d'édition : 06/2006

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