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Inviscid diffusion of vorticity in low-temperature superfluid helium

Lookup NU author(s): Mx Em Rickinson, Professor Nick ParkerORCiD, Dr Andrew BaggaleyORCiD, 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, 2019.

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Abstract

We numerically study the spatial spreading of quantized vortex lines in low-temperature liquid helium. The vortex lines, initially concentrated in a small region, diffuse into the surrounding vortex-free helium, a situation which is typical of many experiments. We find that this spreading, which occurs in the absence of viscosity, emerges from the interactions between the vortex lines and can be interpreted as a diffusion process with effective coefficient equal to approximately 0.5k where k is the quantum of circulation.

Publication metadata

Author(s): Rickinson E, Parker NG, Baggaley AW, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2019

Volume: 99

Print publication date: 03/06/2019

Online publication date: 03/06/2019

Acceptance date: 22/05/2019

Date deposited: 04/06/2019

ISSN (print): 2469-9950

ISSN (electronic): 2469-9969

Publisher: American Physical Society

URL: https://doi.org/10.1103/PhysRevB.99.224501

DOI: 10.1103/PhysRevB.99.224501

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