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Un modèle en dynamique numérique des fluides pour l'écoulement laminaire alternatif dans un canal.

A numerical CFD model for reciprocating laminar flow in a channel.

Auteurs : RAIZNER M., GARAWAY I., GROSSMAN G.

Résumé

A CFD solution is presented for the flow and heat transfer in laminar flow in a channel under oscillating flow. An analysis of compressible flow, such as that of helium, is preceded by that of an incompressible case; the results of the incompressible CFD model have been compared with those of an analytical solution and found to be in excellent agreement. Thus, the analytical model provides a calibration for the numerical one. The CFD solution helps determine the effects of compressibility on the flow and heat transfer. The velocity profiles created by a reciprocating pressure difference are described. The heat transfer has been studied for a situation of a channel with insulated walls and two extreme temperatures at both ends, simulating the conditions of a pulse tube. Temperature profiles are calculated and found to depend on the flow Valensi and Reynolds numbers, on the fluids Prandtl number, and the Eckert number. The convective axial heat loss was calculated and found to be non-zero despite the periodic nature of the flow.

Détails

  • Titre original : A numerical CFD model for reciprocating laminar flow in a channel.
  • Identifiant de la fiche : 2008-1055
  • Langues : Anglais
  • Date d'édition : 14/06/2006
  • Source : Source : Proc. 14th int. Cryocooler Conf., Annapolis, MD
    317-326; fig.; 6 ref.

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