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Simulation numérique de tubes capillaires non adiabatiques. Accent particulier sur la zone proche de la saturation.

Numerical simulation of non-adiabatic capillary tubes. Special emphasis on the near-saturation zone.

Auteurs : ABLANQUE N., OLIET C., RIGOLA J., et al.

Type d'article : Article, Article de la RIF

Résumé

The aim of this article is to present a distributed numerical model that simulates the thermal and fluid-dynamic phenomena inside non-adiabatic capillary tubes. The resolution approach is based on a two-phase flow model where the fluid domain is discretized in a one-dimensional way, and the governing equations (continuity, momentum, and energy) are solved by means of a step-by-step algorithm. The model explained herein consists of an improved and extended version of previous works (Escanes et al., 1995; García-Valladares et al., 2002a,b; Ablanque et al., 2010) including two additional features. On the one hand, it allows the simulation of the two typical geometric arrangements found in capillary-tube/suction-line heat exchangers (i.e. concentric and lateral). On the other hand, it has an enhanced capability to address the convergence difficulties found in distributed models at the near-saturation zone. This document presents the major numerical adaptations done to the model, a comprehensive validation of the two geometric configurations, the model performance when tackling the aforementioned numerical difficulties and finally, some numerical studies.

Documents disponibles

Format PDF

Pages : 153-167

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Numerical simulation of non-adiabatic capillary tubes. Special emphasis on the near-saturation zone.
  • Identifiant de la fiche : 30014735
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 55
  • Date d'édition : 07/2015

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