ENSTROPHY AND MOMENTUM FLUXES IN 2-DIMENSIONAL SHEAR-FLOW TURBULENCE

被引：14
作者：
TOH, S
OHKITANI, K
YAMADA, M
机构：
[1] KYOTO UNIV,MATH SCI RES INST,KYOTO 60601,JAPAN
[2] KYOTO UNIV,DISASTER PREVENT RES INST,UJI,KYOTO 611,JAPAN
来源：
PHYSICA D | 1991年 / 51卷 / 1-3期
关键词：
D O I：
10.1016/0167-2789(91)90264-A
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
Two-dimensional turbulence with a mean linear shear is numerically studied under periodic boundary conditions. Enstrophy is transferred to higher wavenumbers both through nonlinear interaction between turbulent fluctuations and mean linear shear. When the mean shear rate is sufficiently large, enstrophy is transferred exclusively by the latter mechanism and then the energy spectrum and the momentum flux spectrum show k-3-form. Coherent vortices grow when its vorticity has the same sign as that of the background shear.
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页码：569 / 578
页数：10
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