Towards a two-fluid picture of intermittency in shell models of turbulence

Details Towards a two-fluid picture of intermittency in shell models of turbulence Towards a two-fluid picture of intermittency in shell models of turbulence

1997-06-11

arxiv.org/abs/chao-dyn/9706015v1

Nonlinear Sciences

Chaotic Dynamics

4 pages Latex/RevTex, with 5 encapsulated postscript figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.79.5002

Intermittency in the Gledzer-Okhitani-Yamada (GOY) model of turbulence is explained in terms of collisions of coherent soliton-like structures with a random background issuing from the desintegration of their predecessors. This two-fluid picture is substantiated by the elucidation of local dynamical mechanisms leading to anomalous growth of coherent structures, their detection in true signals involving forcing and dissipation, and an investigation of their statistics.

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