Anisotropic homogeneous turbulence : hierarchy and intermittency of scaling exponents in the anisotropic sectors

L. Biferale, F. Toschi

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Abstract

We present the first measurements of anisotropic statistical fluctuations in perfectly homogeneous turbulent flows. We address both problems of intermittency in anisotropic sectors and hierarchical ordering of anisotropies on a direct numerical simulation of a three dimensional random Kolmogorov flow. We achieved an homogeneous and anisotropic statistical ensemble by randomly shifting the forcing phases. We observe high intermittency as a function of the order of the velocity correlation within each fixed anisotropic sector and a hierarchical organization of scaling exponents at fixed order of the velocity correlation at changing the anisotropic sector.
Original languageEnglish
Pages (from-to)4831-4834
JournalPhysical Review Letters
Volume86
Issue number21
DOIs
Publication statusPublished - 2001

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