Local properties of extended self-similarity in 3D turbulence

Abstract

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: $50\le R_{\lambda }\le 459$. The locally determined intermittency exponent $\mu (r)$ varies with $r$; it has a maximum at scale $r=14\eta$, independent of $R_{\lambda }$.

4 pages, 5 figures

References in corpus (2)

• Application of extended self similarity in turbulence
• Longitudinal Structure Functions in Decaying and Forced Turbulence