Mesoscale helicity distinguishes Vinen from Kolmogorov turbulence in helium II
arXiv:1805.09005 · doi:10.1103/PhysRevB.103.144503
Abstract
Experiments and numerical simulations show that quantum turbulence exists in two distinct limiting regimes: Kolmogorov turbulence (which shares with classical turbulence the important property of a cascade of kinetic energy from large eddies to small eddies) and Vinen turbulence (which is more similar to a random flow). In this work, we define a mesoscale helicity for the superfluid, which, tested in numerical experiments, distinguishes the two turbulent regimes, quantifying the amount of nonlocal vortex interactions and the orientation of the vortex lines.
arXiv commentTo be published in Phys. Rev. B (2021)
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