Passive scalar in a random wave field: the weak turbulence approach

被引：12

作者：

Balk, AM ^{[1
]}

McLaughlin, RM

机构：

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

[2] Univ N Carolina, Dept Math, Chapel Hill, NC 27599 USA

来源：

PHYSICS LETTERS A | 1999年 / 256卷 / 04期

基金：

美国国家科学基金会;

关键词：

passive scalar problem; wave turbulence; random waves; advection; turbulent transport; turbulent diffusion;

D O I：

10.1016/S0375-9601(99)00210-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider the evolution of a passive scalar advected by a velocity field which is a superposition of random linear waves. An equation for the average concentration of the passive scalar is derived tin the limit of small molecular diffusion) using the weak turbulence methodology. In addition to the enhanced diffusion, this equation contains the correction to the (Stokes) drift. Both of these terms have the fourth order with respect to wave amplitudes. The formulas for the coefficients of turbulent diffusion and turbulent drift are derived. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：299 / 306

页数：8

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