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Solution analytique pour le transfert combiné de chaleur et de masse dans l'absorption de film laminaire tombant avec vitesse de film uniforme : paroi isotherme et adiabatique.

Analytical solution for combined heat and mass transfer in laminar falling film absorption with uniform film velocity: isothermal and adiabatic wall.

Auteurs : MEYER T.

Type d'article : Article, Article de la RIF

Résumé

In the present study the Laplace transform is applied to the partial differential equations obtained from the differential energy and absorbate balances for the combined heat and mass transfer problem in laminar falling films with uniform film velocity. By means of the inverse Laplace transform an analytical solution is provided for the isothermal as well as for the adiabatic wall boundary condition. Temperature and mass fraction profiles across the film as well as the evolution of the absorbed mass flux as a function of the flow length are presented for the adiabatic wall condition as well as for the isothermal wall with different wall temperatures. Furthermore, the influence of the Lewis number on the absorbed mass flux is discussed. In addition, the present method allows to apply other wall boundary conditions than the isothermal or the adiabatic wall boundary, which will be addressed in a subsequent study.

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Pages : 74-86

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Détails

  • Titre original : Analytical solution for combined heat and mass transfer in laminar falling film absorption with uniform film velocity: isothermal and adiabatic wall.
  • Identifiant de la fiche : 30012668
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 48
  • Date d'édition : 12/2014

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