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Vortex Thermometry for Turbulent Two-Dimensional Fluids

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posted on 2024-07-26, 14:42 authored by Andrew J. Groszek, Matthew J. Davis, David M. Paganin, Kristian Helmerson, Tapio SimulaTapio Simula
We introduce a new method of statistical analysis to characterize the dynamics of turbulent fluids in two dimensions. We establish that, in equilibrium, the vortex distributions can be uniquely connected to the temperature of the vortex gas, and we apply this vortex thermometry to characterize simulations of decaying superfluid turbulence. We confirm the hypothesis of vortex evaporative heating leading to Onsager vortices proposed in Phys. Rev. Lett. 113, 165302 (2014)PRLTAO0031-900710.1103/PhysRevLett.113.165302, and we find previously unidentified vortex power-law distributions that emerge from the dynamics.

Funding

Life is swirl in flatland: two dimensional turbulence in a superfluid

Australian Research Council

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The mass and geometric phase of a superfluid vortex

Australian Research Council

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Nonequilibrium states of polariton superfluids

Australian Research Council

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History

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ISSN

0031-9007

Journal title

Physical Review Letters

Volume

120

Issue

3

Article number

article no. 034504

Pagination

034504-

Publisher

American Physical Society

Copyright statement

Copyright © 2018 American Physical Society. The published version is reproduced in accordance with the copyright policy of the publisher.

Language

eng

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