Intermittency in stochastically perturbed turbulent models

Details Intermittency in stochastically perturbed turbulent models Intermittency in stochastically perturbed turbulent models

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jsp....88.1117b&link_type=abstract

Journal of Statistical Physics, Volume 88, Issue 5-6, pp. 1117-1138

Physics

1

Fully Developed Turbulence, Intermittency, Random Maps, Large Deviations

Scientific paper

Random dynamical models obtained as a perturbation of the GOY (Gledzer-Ohkitani-Yamada) shell model for three-dimensional turbulence are defined. Both static (time-independent) and dynamical scaling properties of the randomly perturbed model are studied. The random static-inviscid manifold, in contrast to the dynamical evolution, does not show intermittent scaling laws. This behavior is linked to the absence of large deviation in the random-map connecting fluctuations of velocities at different scales. The importance of inviscid conserved quantities on the intermittent statistics is discussed. Different random dynamical perturbations such that only energy is conserved in the inviscid and unforced limit are investigated. Intermittency is weakly affected by random perturbations.

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