%0 Journal Article
%T Universality of anisotropic fluctuations from numerical simulations of turbulent flows
%A L. Biferale
%A E. Calzavarini
%A F. Toschi
%A R. Tripiccione
%J Physics
%D 2003
%I arXiv
%R 10.1209/epl/i2003-00233-9
%X We present new results from a direct numerical simulation of a three dimensional homogeneous Rayleigh-Benard system (HRB), i.e. a convective cell with an imposed linear mean temperature profile along the vertical direction. We measure the SO(3)-decomposition of both velocity structure functions and buoyancy terms. We give a dimensional prediction for the values of the anisotropic scaling exponents in this Rayleigh-Benard systems. Measured scaling does not follow dimensional estimate, while a better agreement can be found with the anisotropic scaling of a different system, the random-Kolmogorov-flow (RKF). Our findings support the conclusion that scaling properties of anisotropic fluctuations are universal, i.e. independent of the forcing mechanism sustaining the turbulent flow.
%U http://arxiv.org/abs/nlin/0302036v1