NONLOCALITY IN A FORCED 2-DIMENSIONAL TURBULENCE

被引：24

作者：

OHKITANI, K ^{[1
]}

机构：

[1] KYOTO UNIV, FAC SCI, DEPT PHYS, KYOTO 606, JAPAN

来源：

PHYSICS OF FLUIDS A-FLUID DYNAMICS | 1990年 / 2卷 / 09期

关键词：

D O I：

10.1063/1.857818

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Nonlocality of the enstrophy cascade is revealed numerically by showing that the palinstrophy production is dominated by extremely elongated wave-number triads. More than 85% of the palinstrophy production comes from such triads whose ratio of the smallest wave number to the middle is less than that of the dissipation length to the diameter of the coherent vortices. Such high nonlocality casts some doubt on the universality of the scaling law of energy spectrum. © 1990 American Institute of Physics.

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页码：1529 / 1531

页数：3

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