Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2000-06-23
Nonlinear Sciences
Chaotic Dynamics
4 pages, 5 figures
Scientific paper
10.1103/PhysRevE.64.016304
Using a generalization of extended self-similarity we have studied local scaling properties of 3D turbulence in a direct numerical simulation. We have found that these properties are consistent with lognormal-like behavior of energy dissipation fluctuations with moderate amplitudes for space scales $r$ beginning from Kolmogorov length $\eta$ up to the largest scales, and in the whole range of the Reynolds numbers: $50 \leq R_{\lambda} \leq 459$. The locally determined intermittency exponent $\mu(r)$ varies with $r$; it has a maximum at scale $r=14 \eta$, independent of $R_{\lambda}$.
Bershadskii Alexander
Fukayama Daigen
Gotoh Toshiyuki
Nakano Tohru
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