Lagrangian tracers on a surface flow: The role of time correlations

被引：46

作者：

Boffetta, G

Davoudi, J

Eckhardt, B

Schumacher, J

机构：

[1] Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy

[2] Univ Turin, INFM, I-10125 Turin, Italy

[3] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.93.134501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Finite time correlations of the velocity in a surface flow are found to be important for the formation of clusters of Lagrangian tracers. The degree of clustering characterized by the Lyapunov spectrum of the flow is numerically shown to be in qualitative agreement with the predictions for the white-in-time compressible Kraichnan flow, but to deviate quantitatively. For intermediate values of compressibility the clustering is surprisingly weakened by time correlations.

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页码：134501 / 1

页数：4

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