PERSISTENT SMALL-SCALE ANISOTROPY IN HOMOGENEOUS SHEAR FLOWS

被引：97

作者：

PUMIR, A ^{[1
]}

SHRAIMAN, BI ^{[1
]}

机构：

[1] AT&T BELL LABS, MURRAY HILL, NJ 07974 USA

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.75.3114

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The turbulent velocity fluctuations in a homogeneous shear flow (mean velocity (U) over right arrow = Sy (x) over cap) are studied numerically, in the range of Reynolds number 2600 less than or equal to Re less than or equal to 11 300. The skewness of the z component of vorticity is independent of the Reynolds number in this range, suggesting that some small scale anisotropy remains at very high Reynolds numbers. This anisotropy is not seen in the two-point correlation functions. An analogy is drawn with earlier results on turbulent mixing of a passive scalar with a mean gradient. The relevance of this work for turbulent boundary layers is discussed.

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页码：3114 / 3117

页数：4

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