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Document IIF

Modélisation physique du comportement de la croissance dendritique pendant le chauffage/refroidissement d'un matériau à changement de phase.

Physical modelling of dendritic growth behaviour during cooling/heating of a PCM.

Auteurs : RHAFIKI T. el, KOUSKSOU T., BRUEL P.

Résumé

The capability of predicting accurately the detailed behaviour of phase change materials (PCMs) undergoing a phase change is of paramount importance when designing practical systems using this kind of materials. In particular, the prediction of the dendrite growth dynamics is quite vital since it gives the possibility of optimizing PCM-based energy storage systems submitted to cyclic impulses. In this paper, the authors present a physical model based on the phase-field approach to simulate a dendritic growth occurring during the solidification process of a pure material. The resulting system of partial differential equations is solved numerically by using a finite-difference method. As a first step, 2-D simulations are carried out which make it possible to analyse the shape of the growing dendrites. Then, the effect of the anisotropy on the growth behaviour of these dendrites is also presented and discussed.

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Pages : 2010-5

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Détails

  • Titre original : Physical modelling of dendritic growth behaviour during cooling/heating of a PCM.
  • Identifiant de la fiche : 2010-1480
  • Langues : Anglais
  • Source : 9th Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Sofia, Bulgaria, September 29-October 1, 2010.
  • Date d'édition : 01/09/2010

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