Eulerian and Lagrangian second-order statistics of superfluid He4 grid turbulence

  title={Eulerian and Lagrangian second-order statistics of superfluid 
 grid turbulence},
  author={Y. Tang and W. Guo and Victor S. L’vov and Anna Pomyalov},
  journal={Physical Review B},
We use particle-tracking velocimetry to study Eulerian and Lagrangian second-order statistics of superfluid $^{4}\mathrm{He}$ grid turbulence. The Eulerian energy spectra at scales larger than the mean distance between quantum vortex lines behave classically with close to Kolmogorov-1941 scaling and are almost isotropic. The Lagrangian second-order structure functions and frequency power spectra, measured at scales comparable with the intervortex distance, demonstrate a sharp transition from… 
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