Density and surface tension effects on vortex stability. Part 2. Moore–Saffman–Tsai–Widnall instability

Density and surface tension effects on vortex stability. Part 2. Moore–Saffman–Tsai–Widnall instability
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密度和表面张力对涡流稳定性的影响。

DOI:
10.1017/jfm.2020.1157
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发表时间:
2021
影响因子:
3.7
通讯作者:
Llewellyn Smith, Stefan G.
Llewellyn Smith, Stefan G.
中科院分区:
工程技术2区
文献类型:
--
作者:
Chang, Ching;Llewellyn Smith, Stefan G.

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Moore-Saffman-Tsai-Widnall(MSTW)不稳定性是一种产生于应变涡柱中的参数不稳定性。应变被假定为弱的并且垂直于涡轴。在第二部分中,我们研究了包括密度和表面张力效应在内的涡旋不稳定性,并对这种情况进行了线性稳定性分析。不稳定性是由两个方位波数相隔2的开尔文波之间的共振引起的。得到了开尔文波和谐振模的色散关系。结果表明,与第1部分中研究的曲率不稳定性(Chang & Llewellyn Smith,J. Fluid Mech.vol.913,2021,A14)相比,MSTW不稳定性增加,稳态谐振波衰减。
The Moore–Saffman–Tsai–Widnall (MSTW) instability is a parametric instability that arises in strained vortex columns. The strain is assumed to be weak and perpendicular to the vortex axis. In this second part of our investigation of vortex instability including density and surface tension effects, a linear stability analysis for this situation is presented. The instability is caused by resonance between two Kelvin waves with azimuthal wavenumber separated by two. The dispersion relation for Kelvin waves and resonant modes are obtained. Results show that the stationary resonant waves for increases, the MSTW instability decays, in contrast to the curvature instability examined in Part 1 (Chang & Llewellyn Smith, J. Fluid Mech. vol. 913, 2021, A14).
DOI: 10.1098/rspa.1975.0183
发表时间: 1975-11
期刊: Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
影响因子: --
作者:
D. W. Moore;P. Saffman
通讯作者: D. W. Moore;P. Saffman
DOI: 10.1063/1.857682
发表时间: 1990
期刊: Physics of Fluids
影响因子: 4.6
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发表时间: 2016
影响因子: 3.7
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通讯作者: S. Le Dizès
斜压涡旋的不稳定性
DOI: --
发表时间: 1973
期刊:
影响因子: --
作者:
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通讯作者: P. M. Saunders
DOI: 10.1017/jfm.2020.845
发表时间: 2021
影响因子: 3.7
作者:
Chang, Ching;Llewellyn Smith, Stefan G.
通讯作者: Llewellyn Smith, Stefan G.