Journal of Low Temperature Physics

, Volume 73, Issue 5–6, pp 483–494 | Cite as

Effective viscosity of3He-B at low temperatures

  • Weiyi Zhang
  • J. Kurkijärvi
Article

Abstract

The effective shear viscosity of Poiseuille flow of superfluid3He-B between parallel plates is calculated as a function of temperature at different pressures. Roughness of the surface is adjusted for best fit with experiment, and Andreev scattering is included as evaluated for the self-consistently calculated order parameter. The agreement between theory and experiment is good at high pressures, making use of an ad hoc strong coupling correction to the gap. At low pressures, where the weak coupling theory ought to be accurate, mismatch between theory and experiment is serious. It is speculated that a temperature-dependent roughness of surfaces at low pressures could explain the difficulties there.

Keywords

Viscosity High Pressure Magnetic Material Shear Viscosity Strong Coupling 

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Copyright information

© Plenum Publishing Corporation 1988

Authors and Affiliations

  • Weiyi Zhang
    • 1
  • J. Kurkijärvi
    • 2
  1. 1.Department of Technical PhysicsHelsinki University of TechnologyEspooFinland
  2. 2.Department of Physics and AstronomyNorthwestern UniversityEvanston

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