L. Biferale et al., HELICITY TRANSFER IN TURBULENT MODELS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 57(3), 1998, pp. 2515-2518
Helicity transfer in a shell model of turbulence is investigated. We s
how 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 conservat
ion in Navier-Stokes equations, is derived and tested. The odd part of
the helicity flux statistics is found to be dominated by a few very i
ntense events. In a particular model, we calculate analytically leadin
g and subleading contributions to the scaling of triple velocity corre
lation.