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Large-scale normal fluid circulation in helium superflows

Lookup NU author(s): Dr Luca Galantucci, Dr Michele Sciacca, Professor Carlo Barenghi

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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, 2017.

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Abstract

We perform fully coupled numerical simulations of helium II pure superflows in a channel, with vortex-line density typical of experiments. Peculiar to our model is the computation of the back-reaction of the superfluid vortex motion on the normal fluid and the presence of solid boundaries. We recover the uniform vortex-line density experimentally measured employing second sound resonators and we show that pure superflow in helium II is associated with a large-scale circulation of the normal fluid which can be detected using existing particle-tracking visualization techniques.

Publication metadata

Author(s): Galantucci L, Sciacca M, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2017

Volume: 95

Issue: 1

Online publication date: 13/01/2017

Acceptance date: 02/04/2016

Date deposited: 04/04/2017

ISSN (print): 2469-9950

ISSN (electronic): 2469-9969

Publisher: American Physical Society

URL: https://doi.org/10.1103/PhysRevB.95.014509

DOI: 10.1103/PhysRevB.95.014509

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