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Instabilité de la convection dans une couche de coulis à micro-émulsion de matériau à changement de phase.

The convective instability in a microemulsion phase-change-material slurry layer.

Auteurs : INABA H., DAI C., HORIBE A.

Type d'article : Article

Résumé

In this experimental study, the stability of Rayleigh-Bénard convection was investigated in rectangular enclosures filled with microemulsion phase-change-material (PCM slurry). The PCM slurry exhibited a pseudoplastic non-Newtonian fluid behaviour. Hysteresis in convection was clearly observed while the PCM were in a solid phase and in phase changing. The critical Rayleigh number decreased with the PCM mass concentration while the PCM were in phase changing. The fluid temperature at the center of the enclosure showed a time-dependent oscillation during the transition from a heat conduction state to a convection state. The maximum Nusselt number was observed for all the slurries while the heating plate was controlled at a temperature that most of PCM were in phase changing.

Détails

  • Titre original : The convective instability in a microemulsion phase-change-material slurry layer.
  • Identifiant de la fiche : 2005-0084
  • Langues : Anglais
  • Source : JSME int. J., B - vol. 47 - n. 1
  • Date d'édition : 02/2004

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