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Spectrum of turbulent Kelvin-waves cascade in superfluid helium

Lookup NU author(s): Dr Andrew Baggaley, Professor Carlo Barenghi

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Abstract

To explain the observed decay of superfluid turbulence at very low temperature, it has been proposed that a cascade of Kelvin waves (analogous to the classical Kolmogorov cascade) transfers kinetic energy to length scales that are small enough that sound can be radiated away. We report results of numerical simulations of the interaction of quantized vortex filaments. We observe the development of the Kelvin-waves cascade, and compute the statistics of the curvature, the amplitude spectrum (which we compare with competing theories), and the fractal dimension.


Publication metadata

Author(s): Baggaley AW, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2011

Volume: 83

Issue: 13

Print publication date: 08/04/2011

Date deposited: 20/02/2012

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevB.83.134509

DOI: 10.1103/PhysRevB.83.134509


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