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
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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.
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页码：1403 / 1410
页数：8
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