Helicity Transfer in Turbulent Models
chao-dyn
2009-10-30 v1 Chaotic Dynamics
Abstract
Helicity transfer in a shell model of turbulence is investigated. We show that a Reynolds-independent helicity flux is present in the model when the large scale forcing breaks inversion symmetry. The equivalent in Shell Models of the ``2/15 law'', obtained from helicity conservation in Navier-Stokes eqs., is derived and tested. The odd part of helicity flux statistic is found to be dominated by a few very intense events. In a particular model, we calculate analytically leading and sub-leading contribution to the scaling of triple velocity correlation.
Cite
@article{arxiv.chao-dyn/9707019,
title = {Helicity Transfer in Turbulent Models},
author = {L. Biferale and D. Pierotti and F. Toschi},
journal= {arXiv preprint arXiv:chao-dyn/9707019},
year = {2009}
}
Comments
4 pages, LaTex, 2 figures