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Journal of Low Temperature Physics

, Volume 153, Issue 5–6, pp 127–139 | Cite as

Decay of Turbulence Generated by Spin-Down to Rest in Superfluid 4He

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

Abstract

We report on the extension of the experiments (P.M. Walmsley et al., Phys. Rev. Lett. 99:265302, 2007) on the decay of quasiclassical turbulence generated by an impulsive spin-down from angular velocity Ω to rest of superfluid 4He in a cubic container at temperatures 0.15 K–1.6 K. The density of quantized vortex lines L is measured by scattering negative ions. Following the spin-down, the maximal density of vortices is observed after time t∼10Ω−1. By observing the propagation of ions along the axis of the initial rotation, the transient dynamics of the turbulence spreading from the perimeter of the container into its central region is investigated. Nearly homogeneous turbulence develops after time t∼100Ω−1 and decays as L t −3/2. The effective kinematic viscosity in T=0 limit is ν=0.003κ, where κ=10−3 cm2 s−1 is the circulation quantum.

Keywords

Quantum turbulence Superfluid helium Quantized vortex Turbulence decay 

PACS

67.25.dk 47.27.Gs 47.32.-y 47.37.+q 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • P. M. Walmsley
    • 1
  • A. I. Golov
    • 1
  • H. E. Hall
    • 1
  • W. F. Vinen
    • 2
  • A. A. Levchenko
    • 3
  1. 1.School of Physics and AstronomyThe University of ManchesterManchesterUK
  2. 2.School of Physics and AstronomyUniversity of BirminghamBirminghamUK
  3. 3.Institute of Solid State PhysicsRuss. Acad. Sci.ChernogolovkaRussia

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