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Modélisation hydrodynamique de l'inversion de l'écoulement lors de l'ébullition en écoulement dans des micro-canaux.

Hydrodynamic modeling of flow reversal in micro-channel flow boiling.

Numéro : pap. 2383

Auteurs : BELMARES M., PARK Y. G.

Résumé

Flow boiling in micro-channels have significantly different characteristics from flow boiling in larger channels. One particular behavior of micro-channel boiling is the instability that results in oscillations and flow reversals. This has been a unique challenge for researchers, and a satisfactory solution that eliminates the instability without a substantial performance penalty has not been found. In this study, a simple analytical model based on mass and momentum conservation is developed to identify the mechanistic conditions corresponding to the conditions of flow reversal in a boiling flow in micro-channels. The results indicate that flow reversal can occur when a rapid evaporation occurs near the inlet of the channel. The model also confirms the observations of existing studies that, if a large pressure differential in the channel is imposed in combination with a throttling section before the inlet, the flow reversal can be suppressed.

Documents disponibles

Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Hydrodynamic modeling of flow reversal in micro-channel flow boiling.
  • Identifiant de la fiche : 30013381
  • Langues : Anglais
  • Source : 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 14/07/2014

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