Instanton for random advection

被引：72

作者：

Chertkov, M ^{[1
]}

机构：

[1] WEIZMANN INST SCI,DEPT PHYS COMPLEX SYST,IL-76100 REHOVOT,ISRAEL

来源：

PHYSICAL REVIEW E | 1997年 / 55卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.55.2722

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：

A path integral over trajectories of 2n fluid particles is identified with a 2nth order correlation function of a passive scalar convected by d-dimensional short-correlated multiscale incompressible random velocity flow. Strong intermittency of the scalar is described by means of an instanton calculus (saddle point plus fluctuations about it) in the path integral at n much greater than d. The anomalous scaling exponent of the 2nth scalar's structural function is found analytically.

引用

页码：2722 / 2735

页数：14

共 28 条

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