Anomalous diffusion of a tracer advected by wave turbulence

被引：14

作者：

Balk, AM ^{[1
]}

机构：

[1] Univ Utah, Dept Math, Salt Lake City, UT 84112 USA

来源：

PHYSICS LETTERS A | 2001年 / 279卷 / 5-6期

基金：

美国国家科学基金会;

关键词：

passive advection; turbulent transport; wave turbulence; random waves; near-identity transformation; Green's function;

D O I：

10.1016/S0375-9601(01)00014-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider the advection of a passive tracer when the velocity field is a superposition of random waves. Green's function for the turbulent transport (turbulent diffusion and turbulent drift) is derived. This Grim's function is shown to imply sub-diffusive or super-diffusive behavior of the tracer. For the analysis we introduce the statistical near-identity transformation. The results are confirmed by numerical simulations. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：370 / 378

页数：9

共 33 条

[1] MATHEMATICAL-MODELS WITH EXACT RENORMALIZATION FOR TURBULENT TRANSPORT .2. FRACTAL INTERFACES, NON-GAUSSIAN STATISTICS AND THE SWEEPING EFFECT [J].