Passive scalar structures in peripheral regions of random flows

被引：0
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作者：
A. Chernykh
V. Lebedev
机构：
[1] Russian Academy of Sciences,Institute of Automation and Electrometry, Siberian Branch
[2] Novosibirsk State University,Landau Institute for Theoretical Physics
[3] Russian Academy of Sciences,undefined
来源：
JETP Letters | 2008年 / 87卷
关键词：
05.10.-a; 05.20.-y; 05.40.-a; 47.27.-i;
D O I：
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学科分类号：
摘要：
The statistical properties of the passive scalar near walls in random flows assuming a weakness of its diffusion have been investigated. Then, at advanced stages of the passive scalar mixing, its unmixed residue is concentrated in a narrow diffusive layer near the wall. The numerical simulations have revealed the structures responsible for the passive scalar transport to the bulk; these are passive scalar tongues pulled from the diffusive boundary layer. The passive scalar integrated along the wall possesses a well-pronounced scaling behavior. An analytical scheme, giving exponents of the integral passive scalar moments has been proposed. The exponents reasonably agree with the calculations in 3d.
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页码：682 / 686
页数：4
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