Modeling the interaction of an internal solitary wave with a sill

Modeling the interaction of an internal solitary wave with a sill
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模拟内部孤立波与窗台的相互作用

DOI:
10.1007/s13131-015-0745-1
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发表时间:
2015-11
影响因子:
1.4
通讯作者:
WANG Yang
WANG Yang
中科院分区:
地球科学2区
文献类型:
--
作者:
LI Qun;XU Zhenhua;YIN Baoshu;BAI Tao;LIU Kun;WANG Yang

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建立了一个非静力数值模型,并对具有扩散界面的两层流体中内孤立波(ISW)与底坎的相互作用进行了数值试验。基于阻塞参数(Br),将流动分为三种情况:(1)当海底地形对ISW的传播和空间结构影响不大时(Br<0.5),(2)地形的阻挡作用使ISW发生明显的畸变(虽然没有波浪破碎发生,(0.5<Br<0.7),和(3)当ISW遇到并通过底部地形时被破碎(0.7<Br)。计算结果与实验结果一致。完全再现了Br20.7时事件ISW的断裂过程。当Br <0.7时,耗散率与阻塞参数呈线性关系,当Br增大到1.0时,耗散率最大可达34%左右。在那之后,而不是打破,更多的反思发生了。类似地,破碎诱导的混合在Br约1.0期间也是最有效的,并且可以高达0.16。
A nonhydrostatic numerical model was developed and numerical experiments performed on the interaction of an internal solitary wave (ISW) with a sill, for a two-layer fluid with a diffusive interface. Based on the blocking parameter (Br), the flow was classified into three cases: (1) when bottom topography has little influence on the propagation and spatial structure of the ISW (Br<0.5), (2) where the ISW is distorted significantly by the blocking effect of the topography (though no wave breaking occurs, (0.5<Br<0.7), and (3) where the ISW is broken as it encounters and passes over the bottom topography (0.7<Br). The numerical results obtained here are consistent with those obtained in laboratory experiments. The breaking process of the incident ISW whenBr≈0.7 was completely reproduced. Dissipation rate was linearly related to the blocking parameter whenBr<0.7, and the maximum dissipation rate could reach about 34% asBrraised to about 1.0. After that, instead of breaking, more reflection happened. Similarly, breaking induced mixing was also most effective duringBraround 1.0, and can be up to 0.16.
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发表时间: 2011-11
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发表时间: 1989-07
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