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Three-dimensional inverse energy transfer induced by vortex reconnections

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

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Physical Society, 2014.

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Abstract

In low-temperature superfluid helium, viscosity is zero and vorticity takes the form of discrete vortex filamentsof fixed circulation and atomic thickness. We present numerical evidence of three-dimensional inverse energytransfer from small length scales to large length scales in superfluid turbulence generated by a flow of vortexrings. We argue that the effect arises from the anisotropy of the flow, which favors vortex reconnections of vortexloops of the same polarity, and that it has been indirectly observed in the laboratory. The effect opens questionsabout analogies with related processes in ordinary turbulence.

Publication metadata

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

Publication type: Article

Publication status: Published

Journal: Physical Review E

Year: 2014

Volume: 89

Issue: 1

Print publication date: 06/01/2014

Date deposited: 23/01/2014

ISSN (print): 1539-3755

ISSN (electronic): 1550-2376

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevE.89.013002

DOI: 10.1103/PhysRevE.89.013002

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