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Velocity spectra of superfluid turbulence

Lookup NU author(s): Dr Demosthenes Kivotides, Dr David Samuels, Professor Carlo Barenghi


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We study numerically statistics of superfluid turbulence. We generate a quantized superfiuid vortex tangle driven by a realistic model of normal-fluid turbulence whose energy spectrum obeys Kolmogorov's classical k-5/3 law, where k is the wave number. We find that the resulting superfluid velocity spectrum has approximately a k-1 -dependence for wave numbers of the order of 1/δ and larger, where δ is the average intervortex spacing. This result is similar to what happens in a pure superflow. We also find that the spectrum of the total velocity field follows the classical k-5/3 law, even at temperatures low enough that the normal-fluid mass is only 5% of the total helium mass. We discuss our assumptions and results in view of recent experiments.

Publication metadata

Author(s): Kivotides D, Vassilicos CJ, Samuels DC, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Europhysics Letters

Year: 2002

Volume: 57

Issue: 6

Pages: 845-851

Print publication date: 01/01/2002

ISSN (print): 0295-5075

ISSN (electronic): 1286-4854

Publisher: EDP Sciences


DOI: 10.1209/epl/i2002-00588-3


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