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Impact de la forme du conteneur sur la convection naturelle et la fusion à l'intérieur d'enceintes utilisées pour le refroidissement passif des dispositifs électroniques.

Impact of shape of container on natural convection and melting inside enclosures used for passive cooling of electronic devices.

Auteurs : OMARI K. el, KOUSKSOU T., LE GUER Y.

Type d'article : Article

Résumé

This paper numerically analyzes a passive cooling system using enclosures with different geometries filled with thermal conductivity-enhanced phase change material (PCM). A numerical code is developed using an unstructured finite-volume method and an enthalpy-porosity technique to solve for natural convection coupled to a solid–liquid phase change. Five geometries containing the same volume of PCM are compared while cooling the same surface. The unsteady evolution of the melting front and the velocity and temperature fields is detailed. Other indicators of cooling efficiency are monitored, including the maximum temperature reached at the cooled surface. The computational results show the high impact of varying geometry: a maximum temperature difference as high as 40°C is observed between two of the enclosures. The best efficiency is obtained for an enclosure shifted vertically relative to the cooled surface. Other findings and recommendations are made for the design of PCM-filled enclosures. [Reprinted with permission from Elsevier. Copyright, 2011].

Détails

  • Titre original : Impact of shape of container on natural convection and melting inside enclosures used for passive cooling of electronic devices.
  • Identifiant de la fiche : 30005285
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 31 - n. 14-15
  • Date d'édition : 10/2011
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2011.05.036

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