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Examen critique des modèles analytiques et numériques de la condensation dans les micro-canaux.

A critical review of analytical and numerical models of condensation in microchannels.

Auteurs : KENIAR K., EL FIL B., GARIMELLA S.

Type d'article : Article de la RIF, Synthèse

Résumé

Understanding condensation in microchannels is critical for designing optimized and compact microchannel condensers, which have the potential to increase system level efficiency and reduce system size. Analytical and numerical models can yield insights into local condensation phenomena. This study provides a review of models of condensation in microchannels. These models are categorized based on the applicable, typically annular and intermittent, flow regimes. Annular-flow-based models are further subdivided into analytical models with closed-form solutions, analytical models with numerical solutions, reduced-order CFD models, and full-fledged CFD models. Intermittent-flow-based models are subdivided into single-bubble, repeated-unit-cell, and overall-bubble-train models. The characteristics, use, and range of applicability of each of these models is highlighted. A criterion for the film Reynolds number is proposed for internal forced convective condensation in microchannels, to assess the validity of the modeling assumptions. Annular flow models using the laminar film assumption appear to be valid for Reδ0 < ~ 360, beyond which turbulent effects must be modeled. Intermittent flow models using the laminar film assumption, in turn, appear to be valid for Reδ0 < ~ 130.

Documents disponibles

Format PDF

Pages : 314-330

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 : A critical review of analytical and numerical models of condensation in microchannels.
  • Identifiant de la fiche : 30027833
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 120
  • Date d'édition : 12/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.08.009
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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