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Application du modèle de Brinkman à l'écoulement de la couche limite en convection mixte le long d'un cylindre horizontal en milieu poreux.

Brinkman model for the mixed convection boundary layer flow past a horizontal circular cylinder in a porous medium.

Auteurs : NAZAR R., AMIN N., FILIP D., et al.

Type d'article : Article

Résumé

The Brinkman model is used for the theoretical study of the mixed convection boundary layer flow past a horizontal circular cylinder with a constant surface temperature and embedded in a fluid-saturated porous medium in a stream flowing vertically upwards. Both the cases of a heated (assisting flow) and a cooled (opposing flow) cylinder are considered. It is shown that there are two governing dimensionless parameters. These are the Darcy-Brinkman parameter and the mixed convection parameter. It is found that heating the cylinder delays separation of the boundary layer and can, if the cylinder is warm enough, suppress it completely. On the other hand, cooling the cylinder brings the boundary layer separation point nearer to the lower stagnation point and for sufficiently cold cylinder there will not be a boundary layer on the cylinder. A complete physical description of the problem is presented throughout the analysis. Some results are given in the form of tables.

Détails

  • Titre original : Brinkman model for the mixed convection boundary layer flow past a horizontal circular cylinder in a porous medium.
  • Identifiant de la fiche : 2004-0117
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 17
  • Date d'édition : 07/2003

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