Statistics of Lagrangian velocities in turbulent flows

被引：38

作者：

Friedrich, R ^{[1
]}

机构：

[1] Univ Munster, Inst Theoret Phys, D-48149 Munster, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.90.084501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a generalized Fokker-Planck equation for the joint position-velocity probability distribution of a single fluid particle in a turbulent flow. Based on a simple estimate, the diffusion term is related to the two-point two-time Eulerian acceleration-acceleration correlation. Dimensional analysis yields a velocity increment probability distribution with normal scaling vapproximate tot(1/2). However, the statistics need not be Gaussian.

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页数：4

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