Partager

Thermocapillarité dans un film liquide sur une surface étirable instable.

Thermocapillarity in a liquid film on an unsteady stretching surface.

Auteurs : DANDAPAT B. S., SANTRA B., ANDERSSON H. I.

Type d'article : Article

Résumé

The influence of thermocapillarity on the flow and heat transfer in a thin liquid film on a horizontal stretching sheet is analysed. The time-dependent governing boundary layer equations for momentum and thermal energy are reduced to a set of coupled ordinary differential equations by means of an exact similarity transformation. The resulting three-parameter problem is solved numerically for some representative values of an unsteadiness parameter S and a thermocapillarity number M for Prandtl numbers from 0.001 to 100. The thermocapillary surface forces drag the liquid film in the same direction as the stretching sheet and a local velocity minimum occurs inside the film. The surface velocity, the film thickness, and the Nusselt number at the sheet increase with M. For higher Prandtl numbers, the thermal boundary layer is confined to the lower part of the liquid film and the temperature at the free surface remains equal to the slit temperature and the thermocapillary forces vanish.

Détails

  • Titre original : Thermocapillarity in a liquid film on an unsteady stretching surface.
  • Identifiant de la fiche : 2004-1609
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 16
  • Date d'édition : 07/2003

Liens


Voir d'autres articles du même numéro (2)
Voir la source

Indexation