The generation and trapping of solitary waves over topography
The generation and trapping of solitary waves over topography
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DOI：
10.1126/science.283.5399.188
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发表时间：
1999-01-08
期刊：
影响因子：
56.9
通讯作者：
Armi, L
中科院分区：
文献类型：
--
作者：
Farmer, D;Armi, L
对基栅上潮流的观测表明，上游孤立波的产生与障碍物顶部流线分岔的下游运动同时发生。孤波出现在分叉的上游，骑在表层的分层上。俯冲界面上的剪切流动不稳定性也很明显，这可能有助于通过次谐波相互作用产生波浪。内部控制下游产生的非线性波被困在超临界流中。
Observations of tidal flow over a sill show that upstream solitary wave generation occurred in conjunction with the downstream movement of a streamline bifurcation over the obstacle crest. Solitary waves appeared upstream of the bifurcation, riding on the surface stratification. Shear flow instabilities on the plunging interface were also evident and may contribute to wave generation through subharmonic interaction. Nonlinear waves generated downstream of an internal control became trapped in the supercritical flow.