Vortex clustering, polarisation and circulation intermittency in classical and quantum turbulence.

ABSTRACT: The understanding of turbulent flows is one of the biggest current challenges in physics, as no first-principles theory exists to explain their observed spatio-temporal intermittency. Turbulent flows may be regarded as an intricate collection of mutually-interacting vortices. This picture becomes accurate in quantum turbulence, which is built on tangles of discrete vortex filaments. Here, we study the statistics of velocity circulation in quantum and classical turbulence. We show that, in quantum flows, Kolmogorov turbulence emerges from the correlation of vortex orientations, while deviations-associated with intermittency-originate from their non-trivial spatial arrangement. We then link the spatial distribution of vortices in quantum turbulence to the coarse-grained energy dissipation in

SUBMITTER: Polanco JI 

PROVIDER: S-EPMC8651722 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature