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Lookup NU author(s): Dr Daniel Wacks,
Dr Andrew BaggaleyORCiD,
Professor Carlo Barenghi
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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.
Author(s): Wacks DH, Baggaley AW, Barenghi CF
Publication type: Article
Publication status: Published
Journal: Physical Review B
Print publication date: 01/12/2014
Online publication date: 18/12/2014
ISSN (print): 1098-0121
ISSN (electronic): 1550-235X
Publisher: American Physical Society
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