Instability of strained vortex layers and vortex tube formation in homogeneous turbulence
Instability of strained vortex layers and vortex tube formation in homogeneous turbulence
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均匀湍流中应变涡层和涡管形成的不稳定性
DOI：
10.1017/s0022112095000152
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发表时间：
1995
影响因子：
3.7
通讯作者：
M. Meneguzzi
中科院分区：
文献类型：
--
作者：
T. Passot;H. Politano;P. Sulem;J. Angilella;M. Meneguzzi
本文提出的调制扰动分析表明，当应变涡层变得不稳定时，涡量集中在有限振幅的稳定管状结构中，这与Lin & Corcos（1984）的数值模拟在数量上是一致的。详细的三维可视化表明，这个过程，由于压缩和自诱导旋转的层的组合，是在起源的强烈和长寿的涡流管中观察到的均匀湍流的直接数值模拟。
A modulational perturbation analysis is presented which shows that when a strained vortex layer becomes unstable, vorticity concentrates into steady tubular structures with finite amplitude, in quantitative agreement with the numerical simulations of Lin & Corcos (1984). Elaborated three-dimensional visualizations suggest that this process, due to a combination of compression and self-induced rotation of the layer, is at the origin of intense and long-lived vortex tubes observed in direct numerical simulations of homogeneous turbulence.