Bridging from Eulerian to Lagrangian statistics in 3D hydro- and magnetohydrodynamic turbulent flows

被引：28

作者：

Homann, H. ^{[2
]}

Kamps, O. ^{[3
]}

Friedrich, R.

Grauer, R. ^{[1
]}

机构：

[1] Ruhr Univ Bochum, D-44780 Bochum, Germany

[2] Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Cassiopee, F-06300 Nice, France

[3] Univ Munster, Ctr Nonlinear Sci, D-48149 Munster, Germany

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

FULLY-DEVELOPED TURBULENCE;

D O I：

10.1088/1367-2630/11/7/073020

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present measurements of conditional probability density functions (PDFs) that allow one to systematically bridge from Eulerian to Lagrangian statistics in fully developed 3D turbulence. The transition is investigated for hydro- as well as magnetohydrodynamic flows and comparisons are drawn. Significant differences in the transition PDFs are observed for these flows and traced back to the differing coherent structures. In particular, we address the problem of an increasing degree of intermittency going from Eulerian to Lagrangian coordinates by means of the conditional PDFs involved in this transformation. First simple models of these PDFs are investigated in order to distinguish different contributions to the degree of Lagrangian intermittency.

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