Vortex Thermometry for Turbulent Two-Dimensional Fluids

Abstract

We introduce a new method of statistical analysis to characterise 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 apply this vortex thermometry to characterise 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 find previously unidentified vortex power-law distributions that emerge from the dynamics.

8 pages, 9 figures

References in corpus (13)

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• Relaxation of superfluid turbulence in highly oblate Bose-Einstein condensates
• Quantum and quasiclassical types of superfluid turbulence
• Inverse Energy Cascade in Forced 2D Quantum Turbulence
• Energy spectra of vortex distributions in two-dimensional quantum turbulence
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• Observation of von Kármán Vortex Street in an Atomic Superfluid Gas
• In situ imaging of vortices in Bose-Einstein condensates
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Cited by in corpus (17)

• Order from chaos: Observation of large-scale flow from turbulence in a two-dimensional superfluid
• Motion of vortices in inhomogeneous Bose-Einstein condensates
• Onset of vortex clustering and inverse energy cascade in dissipative quantum fluids
• The true mechanism of spontaneous order from turbulence in two-dimensional superfluid manifolds
• Einstein-Bose condensation of Onsager vortices
• 2D Quantum Turbulence in Polariton Condensates
• Decaying quantum turbulence in a two-dimensional Bose-Einstein condensate at finite temperature
• Observation of bistable turbulence in quasi-two-dimensional superflow
• Turbulence Excitation in Counter-Streaming Paraxial Superfluids of Light
• Decay of two-dimensional quantum turbulence in binary Bose-Einstein condensates
• Non-equilibrium Statistical Mechanics of Two-dimensional Vortices
• Crossover in the dynamical critical exponent of a quenched two-dimensional Bose gas
• A damped point-vortex model for polar-core spin vortices in a ferromagnetic spin-1 Bose-Einstein condensate
• Transfer of orbital angular momentum superposition from asymmetric Laguerre-Gaussian beam to Bose-Einstein Condensate
• Dynamics of Onsager vortex clustering in decaying turbulent polariton quantum fluids
• Machine learning classification of two-dimensional vortex configurations
• Driven-dissipative turbulence in exciton-polariton quantum fluids