Vortex-density fluctuations, energy spectra, and vortical regions in superfluid turbulence


Measurements of the energy spectrum and of the vortex-density fluctuation spectrum in superfluid turbulence seem to contradict each other. Using a numerical model, we show that at each instance of time the total vortex line density can be decomposed into two parts: one formed by metastable bundles of coherent vortices, and one in which the vortices are randomly oriented. We show that the former is responsible for the observed Kolmogorov energy spectrum, and the latter for the spectrum of the vortex line density fluctuations.

Publication DOI: https://doi.org/10.1103/PhysRevLett.109.205304
Divisions: College of Engineering & Physical Sciences
Publication ISSN: 1079-7114
Full Text Link: http://journals ... Lett.109.205304
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PURE Output Type: Article
Published Date: 2012-11-14
Submitted Date: 2012-07-31
Authors: Baggaley, Andrew W.
Laurie, Jason (ORCID Profile 0000-0002-3621-6052)
Barenghi, Carlo F.



Version: Accepted Version

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