• Open Access

Vortex Thermometry for Turbulent Two-Dimensional Fluids

Andrew J. Groszek, Matthew J. Davis, David M. Paganin, Kristian Helmerson, and Tapio P. Simula
Phys. Rev. Lett. 120, 034504 – Published 19 January 2018
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Abstract

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), and we find previously unidentified vortex power-law distributions that emerge from the dynamics.

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  • Received 17 February 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.034504

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAtomic, Molecular & Optical

Authors & Affiliations

Andrew J. Groszek1, Matthew J. Davis2, David M. Paganin1, Kristian Helmerson1, and Tapio P. Simula1

  • 1School of Physics and Astronomy, Monash University, Victoria 3800, Australia
  • 2School of Mathematics and Physics, University of Queensland, Queensland 4072, Australia

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Issue

Vol. 120, Iss. 3 — 19 January 2018

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