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Transfert simultané de masse et de chaleur par convection mixte turbulente dans un film tombant d'eau à l'intérieur d'un tube vertical chauffé.

Concurrent turbulent mixed convection heat and mass transfer in a falling film of water inside a vertical heated tube.

Auteurs : FEDDAOUI M., MIR A., BELAHMIDI E.

Type d'article : Article

Résumé

A detailed numerical study was conducted in order to analyse the combined buoyancy effects of thermal and mass diffusion on the turbulent mixed convection tube flows. Numerical results for an air-water system are presented under different conditions. A low Reynolds number turbulent model is used with combined heat and mass transfer analysis in a vertical heated tube. The local heat fluxes, Nusselt and Sherwood numbers are reported to obtain an understanding of the physical phenomena. Predicted results show that better heat transfer results for a higher gas flow Reynolds number, a higher heat flux or a lower inlet water flow. Additionally, the results indicate that the heat convection by the flowing water film becomes the main mechanism for heat removal from the wall.

Détails

  • Titre original : Concurrent turbulent mixed convection heat and mass transfer in a falling film of water inside a vertical heated tube.
  • Identifiant de la fiche : 2004-0512
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 18
  • Date d'édition : 08/2003

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