Fluctuations of passive scalar concentration with nonzero mean gradient in random velocity fields

被引：0

作者：

Klyatskin, VI ^{[1
]}

Woczynski, WA ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,PACIFIC OCEANOL INST,VLADIVOSTOK 690041,RUSSIA

来源：

ZHURNAL EKSPERIMENTALNOI I TEORETICHESKOI FIZIKI | 1995年 / 108卷 / 04期

关键词：

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fluctuations of a passive scalar concentration in a random velocity field are considered. Statistical quantities related to the spatial derivatives of the concentration field are calculated in the presence of a nonzero mean concentration gradient and in the delta-correlation approximation. This permits an estimation of the stationary variance of the concentration, which has a logarithmic dependence on the molecular diffusion coefficient. Conditions for the applicability of the delta-correlated approximation in this problem are obtained.

引用

页码：1403 / 1410

页数：8

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