Vortex Thermometry for Turbulent Two-Dimensional Fluids

2017/02/28 by Andrew J. Groszek, Matthew J. Davis, David M. Paganin +3
Engineering · Physics and Astronomy · #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Fluid Dynamics and Turbulent Flows #Mechanics #Physics #Quantum, superfluid, helium dynamics #Statistical physics #Superfluidity #Tourbillon #Turbulence #Vortex #cond-mat.quant-gas

paper · pdf · doi:10.1103/physrevlett.120.034504

published as Phys. Rev. Lett. 120, 034504 (2018) · 8 pages, 9 figures

openalex publication_date 2018/01/19 · arxiv created 2018/01/22 · arxiv updated 2018/01/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

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• Statistical hydrodynamics