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Echange thermique et mode d'écoulement de l'hélium superfluide dans des canaux étroits.

Heat transfer and flow of He II in narrow channels.

Auteurs : SUEKANE T., SEKIGUCHI M., HIRAI S., et al.

Type d'article : Article

Résumé

Narrow channels are used to cool compact, stable, low-temperature magnets. The fluid flow is driven by natural convection and the mutual friction between the normal fluid and the superfluid. In this model, the thermomechanical effect and the Gorter-Mellink mutual friction balance each other. A consequence of this balance is that the velocity and temperature distributions of He II can be characterized by a dimensionless, dependent parameter equal to the ratio of the fluid speeds of internal convection to the total fluid flow. After a sudden application of heat flux, the internal convection dominates over the total fluid flow until the establishment of steady-state temperature gradients. This predicts that the time required to set up the steady-state total fluid flow is proportional to the total heat capacity in the channel.

Détails

  • Titre original : Heat transfer and flow of He II in narrow channels.
  • Identifiant de la fiche : 2005-0014
  • Langues : Anglais
  • Source : Cryogenics - vol. 43 - n. 2
  • Date d'édition : 02/2003

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