Ballistic versus diffusive pair dispersion in the Richardson regime

被引：51

作者：

Sokolov, IM

Klafter, J

Blumen, A

机构：

[1] Univ Freiburg, D-79104 Freiburg, Germany

[2] Tel Aviv Univ, Sch Chem, IL-69978 Tel Aviv, Israel

来源：

PHYSICAL REVIEW E | 2000年 / 61卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.61.2717

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Two-particle dispersion in fully developed turbulence is modeled within an asymmetric Levy-walk framework which yields the Richardson t(3) law and which recovers recently observed results on the probability distribution function of pair separations in two-dimensional turbulence [M.C. Jullien, J. Paret, and P. Tabeling, Phys. Rev. Lett. 82, 2872 (1999)]. The ballistic nature of the Richardson dispersion is discussed in terms of the persistence parameter and compared with the Richardson diffusive behavior.

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页码：2717 / 2722

页数：6

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