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Lookup NU author(s): Dr Luca Galantucci, Professor Carlo Barenghi, Dr Nick Parker, Dr Andrew Baggaley
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Experiments and numerical simulations show that quantum turbulence exists in two distinct limiting regimes: Kolmogorov turbulence (which shares with classical turbulence the important property of a cascade of kinetic energy from large eddies to small eddies) and Vinen turbulence (which is more similar to a random flow). In this work, we define a mesoscale helicity for the superfluid, which, tested in numerical experiments, distinguishes the two turbulent regimes, quantifying the amount of nonlocal vortex interactions and the orientation of the vortex lines.
Author(s): Galantucci L, Barenghi CF, Parker NG, Baggaley AW
Publication type: Article
Publication status: Published
Journal: Physical Review B
Year: 2021
Volume: 13
Online publication date: 06/04/2021
Acceptance date: 29/03/2021
Date deposited: 06/04/2021
ISSN (electronic): 2469-9969
Publisher: American Physical Society
URL: https://doi.org/10.1103/PhysRevB.103.144503
DOI: 10.1103/PhysRevB.103.144503
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