Dissipation of quantum turbulence in the zero temperature limit

P. M. Walmsley, A. I. Golov, H. E. Hall, A. A. Levchenko, W. F. Vinen

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    Abstract

    Turbulence, produced by an impulsive spin down from angular velocity Ω to rest of a cube-shaped container, is investigated in superfluid He4 at temperatures 0.08 K-1.6 K. The density of quantized vortex lines L is measured by scattering negative ions. Homogeneous turbulence develops after time t≈20/Ω and decays as Lαt-3/2. The corresponding energy flux =ν′(κL)2αt-3 is characteristic of quasiclassical turbulence at high Re with a saturated energy-containing length. The effective kinematic viscosity in T=0 limit is ν′=0.003κ, where κ=10-3cm2s-1 is the circulation quantum. © 2007 The American Physical Society.
    Original languageEnglish
    Article number265302
    JournalPhysical Review Letters
    Volume99
    Issue number26
    DOIs
    Publication statusPublished - 26 Dec 2007

    Keywords

    • quantum turbulence, superfluid helium, quantized vortex, zero temperature limit

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