Vortex Thermometry for Turbulent Two-Dimensional Fluids

Andrew J. Groszek, Matthew J. Davis, David M. Paganin, Kristian Helmerson, Tapio P. Simula

Research output: Contribution to journalArticleResearchpeer-review

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)PRLTAO0031-900710.1103/PhysRevLett.113.165302, and we find previously unidentified vortex power-law distributions that emerge from the dynamics.

Original languageEnglish
Article number034504
Number of pages5
JournalPhysical Review Letters
Volume120
Issue number3
DOIs
Publication statusPublished - 19 Jan 2018

Cite this

Groszek, Andrew J. ; Davis, Matthew J. ; Paganin, David M. ; Helmerson, Kristian ; Simula, Tapio P. / Vortex Thermometry for Turbulent Two-Dimensional Fluids. In: Physical Review Letters. 2018 ; Vol. 120, No. 3.
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Vortex Thermometry for Turbulent Two-Dimensional Fluids. / Groszek, Andrew J.; Davis, Matthew J.; Paganin, David M.; Helmerson, Kristian; Simula, Tapio P.

In: Physical Review Letters, Vol. 120, No. 3, 034504, 19.01.2018.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Simula, Tapio P.

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