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Area of Science:

  • Physics
  • Fluid Dynamics
  • Quantum Mechanics

Background:

  • Understanding turbulent flows and their intermittency remains a significant challenge in physics.
  • Turbulent flows can be conceptualized as interacting vortices, a model that holds true for quantum turbulence composed of discrete vortex filaments.

Purpose of the Study:

  • To investigate the statistics of velocity circulation in both quantum and classical turbulence.
  • To establish a connection between the intermittency observed in quantum and classical turbulence.

Main Methods:

  • Statistical analysis of velocity circulation in quantum and classical turbulent flows.
  • Correlation analysis of vortex orientations in quantum turbulence.
  • Linking the spatial distribution of vortices in quantum turbulence to energy dissipation in classical turbulence.

Main Results:

  • Kolmogorov turbulence emerges in quantum flows due to the correlation of vortex orientations.
  • Intermittency in quantum turbulence originates from the non-trivial spatial arrangement of vortices.
  • A link is established between the spatial distribution of vortices in quantum turbulence and coarse-grained energy dissipation in classical turbulence.

Conclusions:

  • The study reveals that vortex orientation correlations drive Kolmogorov turbulence in quantum flows.
  • The spatial arrangement of vortices is identified as the source of intermittency in quantum turbulence.
  • This research enables the application of classical turbulence intermittency models to quantum turbulence, advancing the understanding of both.