Partager

Document IIF

Modélisation numérique des effets de l’huile sur la condensation en film laminaire annulaire à l’intérieur de microcanaux.

Numerical modeling of the effects of oil on annular laminar film condensation in minichannels.

Auteurs : NEBULONI S., THOME J. R.

Type d'article : Article, Article de la RIF

Résumé

This paper presents a numerical model to predict laminar film condensation heat transfer in small channels of different internal geometries for miscible refrigerant-oil mixtures. The model includes the contributions of surface tension, axial shear stresses induced by the vapor to film interface, gravitational forces, wall conduction and the oil concentration dependency on the liquid’s dynamic viscosity. For the same operative conditions and fluid, the presence of the oil has a significant negative impact on the thermal performance at high vapor qualities, with the degradation depending on the channel’s shape. Presently, the performance of different channel shapes (circular and flattened shapes) are simulated and compared. It is concluded that the presence of oil has slightly less effect on capillary-dominated regimes (i.e. when the surface tension has a strong effect on the film dynamics) than on gravity-dominated regimes (i.e. annular stratified regime).

Documents disponibles

Format PDF

Pages : 1545-1556

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Numerical modeling of the effects of oil on annular laminar film condensation in minichannels.
  • Identifiant de la fiche : 30008169
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 5
  • Date d'édition : 08/2013

Liens


Voir d'autres articles du même numéro (16)
Voir la source

Indexation