Taylor Particle Dispersion during Transition to Fully Developed Two-Dimensional Turbulence

被引：22

作者：

Xia, H. ^{[1
]}

Francois, N. ^{[1
]}

Punzmann, H. ^{[1
]}

Shats, M. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys & Engn, Canberra, ACT 0200, Australia

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

ANOMALOUS DIFFUSION; STATISTICS; WALKS; FLOW;

D O I：

10.1103/PhysRevLett.112.104501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report new measurements of single particle dispersion in turbulent two-dimensional (2D) flows. Laboratory experiments in electromagnetically driven and Faraday wave driven turbulence reveal a transition from weakly dispersing superdiffusive regime to strongly dispersing Brownian diffusion as the flow energy is increased in a broad range. The transition to fully developed 2D turbulence is characterized by the topological changes in the fluid particle trajectories and the development of self-similar diffusion. The degree of 2D turbulence development can be quantified by a parameter describing the deviation of single particle dispersion from the Taylor dispersion.

引用

页数：5

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