Decaying quasi-two-dimensional turbulence in a thin liquid layer

被引：4

作者：

Danilov, SV ^{[1
]}

Dovzhenko, VA ^{[1
]}

Dolzhanskii, FV ^{[1
]}

Kochina, VG ^{[1
]}

机构：

[1] Russian Acad Sci, Obukhov Inst Atmospher Phys, Moscow 109017, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2002年 / 95卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1499900

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The results of laboratory measurements of decaying quasi-two-dimensional turbulence in a thin liquid layer are considered. It is shown that the enstrophy-to-energy ratio decreases according to a power law on a certain decay interval. The exponent in the power law is a function of the Reynolds number. The enstrophy decay is found to be anomalously slow as predicted in a number of numerical studies. It is shown that the anomalous decay in the quasi-two-dimensional flow under investigation is not due to intense vortex formation as in the numerical decaying turbulence, but due to the limited range of scales on which a flow can be regarded as two-dimensional. (C) 2002 MAIK "Nauka / Interperiodica".

引用

页码：48 / 56

页数：9

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