Helicity Transfer in Turbulent Models

Details Helicity Transfer in Turbulent Models Helicity Transfer in Turbulent Models

1997-07-21

arxiv.org/abs/chao-dyn/9707019v1

PRE, Vol. 57, Numb. 3, Pag. 2515, March 1998

Nonlinear Sciences

Chaotic Dynamics

4 pages, LaTex, 2 figures

Scientific paper

10.1103/PhysRevE.57.R2515

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.

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