Lagrangian and Eulerian statistics in homogeneous, anisotropic flows

ORAL

Abstract

We report results from highly resolved direct numerical simulations of anisotropic homogeneous flows using up to $2048^3$ collocations points. We examine a turbulent Kolmogorov flow with randomly correlated phases in order to recover space homogeneity on average. We present Eulerian and Lagrangian measurements concerning the universality of isotropic and anisotropic contributions using a systematic decomposition based on the eigenfunctions of the SO$(3)$ group of rotations in three dimensions. Additionally, we discuss absolute dispersion statistics of particles in flows subjected to different large-scale anisotropies.

*ERC ADG NewTURB 2013

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Authors

  • K.P. Iyer

    • Department of Physics and INFN, University of Rome, Tor Vergata
    • Univ of Rome Tor Vergata and INFN, Italy

  • Fabio Bonaccorso

    • Department of Physics and INFN, University of Rome, Tor Vergata
    • Department of Physics \& INFN, University of Rome Tor Vergata, Rome, Italy.

  • Federico Toschi

    • Department of Applied Physics, University of Eindhoven
    • Eindhoven Univ of Tech
    • Eindhoven University of Technology
    • Technische Universiteit Eindhoven
    • TU Eindhoven

  • Luca Biferale

    • Department of Physics and INFN, University of Rome, Tor Vergata
    • University of Rome Tor Vergata
    • Deparment of Physics, University of Rome Tor Vergata and INFN
    • Department of Physics \& INFN, University of Rome Tor Vergata, Rome, Italy.