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Bulles de vapeur se glissant et se collant au-dessous des plans inclinés et des surfaces courbées.

Sliding and sticking vapour bubbles under inclined plane and curved surfaces.

Auteurs : YAN Y., KENNING D., CORNWELL K.

Type d'article : Article, Article de la RIF

Résumé

In flow boiling heat is transferred by the combined effects of nucleate boiling, with local generation of bubbles, and evaporatative and convective cooling by the passage of bubbles generated elsewhere. In the paper, nucleate boiling was eliminated by measuring the heat transfer near injected steam bubbles sliding under an inclined plate heated to low superheats, using liqud crystal thermography combined with high speed video recording and computerised image analysis. Heat was transferred by evaporation on the thin liquid film between the bubble and the wall and by enhanced convection in a wake region wider than the bubble and many bubble diameters long. Evaporation was the dominant mechanism for large, easily deformed, slow-moving bubbles. For small, faster-moving bubbles the reduction in evaporation was offset by an improvement in convection.

Documents disponibles

Format PDF

Pages : 583-591

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 : Sliding and sticking vapour bubbles under inclined plane and curved surfaces.
  • Identifiant de la fiche : 1998-2206
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 20 - n. 8
  • Date d'édition : 12/1997

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