Nonlinear instability of a Rossby-wavecritical layer

Nonlinear instability of a Rossby-wavecritical layer
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罗斯贝波临界层的非线性不稳定性

DOI:
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发表时间:
1985
影响因子:
3.7
通讯作者:
P. Haynes
P. Haynes
中科院分区:
工程技术2区
文献类型:
--
作者:
P. Haynes

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由Stewartson-Warn-Warn解给出的Rossby波非线性临界层中的涡度分布,可能会受到剪切不稳定作用的强烈修正。在另一篇论文(Killworth & McIntyre 1985)中,用线性理论证明了不稳定模式确实存在。在这里,使用数值方法,不稳定扰动的非线性演化是后续的时间,在它们的增长停止。到了这个时候,临界层中的涡量已经有了相当大的再分布.
The vorticity distribution in a Rossby-wave nonlinear critical layer, given by the Stewartson–Warn–Warn solution, may be strongly modified by the action of shear instability. In a companion paper (Killworth & McIntyre 1985) it was shown, using linear theory, that unstable modes indeed existed. Here, using numerical methods, the nonlinear evolution of unstable disturbances is followed up to the time at which their growth ceases. By such a time there has been considerable redistribution of vorticity in the critical layer.