Non-Gaussian distributions in extended dynamical systems.
نویسندگان
چکیده
We propose a novel mechanism for the origin of non-Gaussian tails in the probability distribution functions (PDFs) of local variables in nonlinear, diffusive, dynamical systems including passive scalars advected by chaotic velocity fields. Intermittent fluctuations on appropriate time scales in the amplitude of the (chaotic) noise can lead to exponential tails. We provide numerical evidence for such behavior in deterministic, discrete-time passive scalar models. Different possibilities for PDFs are also outlined. PACS numbers: 02.50Ey,05.40+j,47.27Qb
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ورودعنوان ژورنال:
- Physical review letters
دوره 71 22 شماره
صفحات -
تاریخ انتشار 1993