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Large-scale superfluid vortex rings at nonzero temperatures

Lookup NU author(s): Dr Daniel Wacks, Dr Andrew BaggaleyORCiD, Professor Carlo Barenghi

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Abstract

We numerically model experiments in which large-scale vortex rings-bundles of quantized vortex loops-are created in superfluid helium by a piston-cylinder arrangement. We show that the presence of a normal-fluid vortex ring together with the quantized vortices is essential to explain the coherence of these large-scale vortex structures at nonzero temperatures, as observed experimentally. Finally we argue that the interaction of superfluid and normal-fluid vortex bundles is relevant to recent investigations of superfluid turbulence.

Publication metadata

Author(s): Wacks DH, Baggaley AW, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2014

Volume: 90

Issue: 22

Print publication date: 01/12/2014

Online publication date: 18/12/2014

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevB.90.224514

DOI: 10.1103/PhysRevB.90.224514

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