From 2D to 3D turbulence through 2D3C configurations

ORAL

Abstract

We study analytically and numerically the geometry of the nonlinear interactions and the resulting energy transfer directions of 2D3C flows. Through a set of suitably designed Direct Numerical Simulations we also study the coupling between several 2D3C flows, where we explore the transition between 2D and fully 3D turbulence. In particular, we find that the coupling of three 2D3C flows on mutually orthogonal planes subject to small-scale forcing leads to a stationary 3D out-of-equilibrium dynamics at the energy containing scales where the inverse cascade is directly balanced by a forward cascade carried by a different subsets of interactions [L. Biferale et al, Physics of Fluids 29, 111101 (2017)].

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Authors

  • Michele Buzzicotti

    Dept. Physics and INFN University of Rome Tor Vergata, Department of Physics and INFN, University of Rome Tor Vergata

  • Luca Biferale

    University of Rome Tor Vergata, University of Roma Tor Vergata, Dept. Physics and INFN University of Rome Tor Vergata, Department of Physics and INFN, University of Rome Tor Vergata, Univ of Rome Tor Vergata

  • Moritz Linkmann

    Dept. Physics and INFN University of Rome Tor Vergata, Department of Physics and INFN, University of Rome Tor Vergata, University of Rome Tor Vergata