Dynamics of quantum turbulence of different spectra
P. M. Walmsley, D. E. Zmeev, F. Pakpour, A. I. Golov
TL;DR
This paper reviews the behavior and decay of quantum turbulence in superfluid helium-4 at near-zero temperatures, highlighting experimental findings and their comparison with theoretical models.
Contribution
It provides a comprehensive overview of recent experimental measurements of vortex decay in different turbulence regimes at ultra-low temperatures.
Findings
Decay patterns differ between ultraquantum and quasiclassical turbulence.
Effective dissipation varies with temperature and turbulence type.
Experimental results align with certain theoretical predictions.
Abstract
Turbulence in a superfluid in the zero temperature limit consists of a dynamic tangle of quantized vortex filaments. Different types of turbulence are possible depending on the level of correlations in the orientation of vortex lines. We provide an overview of turbulence in superfluid He with a particular focus on recent experiments probing the decay of turbulence in the zero temperature regime below 0.5 K. We describe extensive measurements of the vortex line density during the free decay of different types of turbulence: ultraquantum and quasiclassical turbulence in both stationary and rotating containers. The observed decays and the effective dissipation as a function of temperature are compared with theoretical models and numerical simulations.
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