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Lookup NU author(s): Dr George Stagg, Professor Nick ParkerORCiD, Professor Carlo Barenghi
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Using the classical field method, we study numerically the characteristics and decay of the turbulent tangle of superfluid vortices which is created in the evolution of a Bose gas from highly nonequilibrium initial conditions. By analyzing the vortex line density, the energy spectrum, and the velocity correlation function, we determine that the turbulence resulting from this effective thermal quench lacks the coherent structures and the Kolmogorov scaling; these properties are typical of both ordinary classical fluids and of superfluid helium when driven by grids or propellers. Instead, thermal quench turbulence has properties akin to a random flow, more similar to another turbulent regime called ultraquantum turbulence, which has been observed in superfluid helium.
Author(s): Stagg GW, Parker NG, Barenghi CF
Publication type: Article
Publication status: Published
Journal: Physical Review A
Year: 2016
Volume: 94
Issue: 5
Print publication date: 28/11/2016
Online publication date: 28/11/2016
Acceptance date: 28/11/2016
Date deposited: 28/11/2016
ISSN (print): 2469-9926
ISSN (electronic): 2469-9934
Publisher: American Physical Society
URL: http://dx.doi.org/10.1103/PhysRevA.94.053632
DOI: 10.1103/PhysRevA.94.053632
Data Access Statement: http://dx.doi.org/10.17634/101785-3
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