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arXiv · 0710.1033

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 Omega to rest of a cube-shaped container, is investigated in superfluid 4He 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 of approximately 20 Ωand decays as L proportional to t^(-3/2). The corresponding energy flux epsilon = nu' (kappa L)^2, which is proportional to t^(-3), is characteristic of quasi-classical turbulence at high Re with a saturated energy-containing length. The effective kinematic viscosity in the T=0 limit is nu' = 0.003 kappa, where kappa=10^(-3) cm^2 / s is the circulation quantum.

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P. M. Walmsley, A. I. Golov, H. E. Hall, A. A. Levchenko, W. F. Vinen. 2007-10-31. Dissipation of Quantum Turbulence in the Zero Temperature Limit. https://doi.org/10.1103/physrevlett.99.265302

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