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Lookup NU author(s): Dr Andrew Baggaley,
Professor Carlo Barenghi
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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.
Author(s): Baggaley AW, Laurie J, Barenghi CF
Publication type: Article
Publication status: Published
Journal: Physical Review Letters
Print publication date: 01/11/2012
ISSN (print): 0031-9007
ISSN (electronic): 1079-7114
Publisher: American Physical Society
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