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Ecoulement du film liquide en évaporation sous l'influence du cisaillement dans un microcanal avec une source de chaleur locale.

Evaporating shear-driven liquid film flow in minichannel with local heat source.

Auteurs : GATAPOVA E. Y., KABOV O. A., KUZNETSOV V. V., et al.

Type d'article : Article

Résumé

The aim of this work is an investigation of the evaporation effect on the heat transfer of liquid film flow in a channel of 0.5:5-mm height. The 2-D model of locally heated liquid film moving under gravity and the action of co-current gas flow with low viscosity in a minichannel are considered, taking into account that the surface tension is depending on temperature. The velocity profiles in the gas and liquid regions are calculated as the solution of the problem of joint motion of isothermal non-deformable liquid film and gas flow. Using the findings the joint solution of heat exchanger and diffusion problem with corresponding boundary condition is calculated. Having the temperature field in the whole liquid and gas flow region we find a local heat transfer coefficient on the gas-liquid interface and Biot number as a function of flow parameters and spatial variables. The calculations show that the dependence of Biot number along the longitudinal axis has a hyperbolic character.

Détails

  • Titre original : Evaporating shear-driven liquid film flow in minichannel with local heat source.
  • Identifiant de la fiche : 2007-0570
  • Langues : Anglais
  • Source : J. Eng. Thermophys. - vol. 13 - n. 2
  • Date d'édition : 2005

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