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Coherent vortex structures in quantum turbulence

Lookup NU author(s): Dr Andrew BaggaleyORCiD, Professor Carlo Barenghi, Professor Anvar ShukurovORCiD, Emeritus Professor Yuri Sergeev

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Abstract

Quantum turbulence, easily generated in superfluid helium, consists of a disordered tangle of thin, discrete vortex lines of quantised circulation which move in a fluid without viscosity. In this report we show that, in very intense quantum turbulence, the vortex tangle contains small coherent vortical structures (bundles of quantised vortices) which arise from the fundamental Biot-Savart interaction between vortices, and which are similar to the intermittent, coherent structures ("worms") observed in ordinary viscous turbulence. Our result highlights the similarity between quantum turbulence and ordinary turbulence, and sheds new light into the origin of the " worms" in ordinary turbulence. Copyright (C) EPLA, 2012

Publication metadata

Author(s): Baggaley AW, Barenghi CF, Shukurov A, Sergeev YA

Publication type: Article

Publication status: Published

Journal: Europhysics Letters

Year: 2012

Volume: 98

Issue: 2

Print publication date: 01/04/2012

Date deposited: 15/11/2013

ISSN (print): 0295-5075

ISSN (electronic):

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1209/0295-5075/98/26002

DOI: 10.1209/0295-5075/98/26002

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