Simulation of evolution of gravity wave groups with moderate steepness

Simulation of evolution of gravity wave groups with moderate steepness
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中等陡度重力波群演化模拟

DOI:
10.1016/j.ocemod.2015.12.003
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发表时间:
2016-02
期刊:
影响因子:
3.2
通讯作者:
Chen X.B.
Chen X.B.
中科院分区:
地球科学3区
文献类型:
--
作者:
Zheng K.;Zhao B.B.;Duan W.Y.;Ertekin R.C.;Chen X.B.

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本文研究了一维非线性深水波群的演化。强非线性Green-Naghdi(GN)模型被用来模拟这一现象。根据对流场垂向结构的不同流速假设,GN模型有不同的层次,如GN-1、GN-2等。在这项工作中,我们使用GN-3和GN-4模型进行模拟。由于包络孤子的数量取决于每组波的数量(N),因此对每组(或包)三个不同数量的波进行计算。数值结果表明,GN-3模型能给出收敛的GN结果。我们进行了一系列的物理实验来研究波群的演化。我们还使用其他的实验数据和目前的实验室测量的GN模型的预测数据进行比较,并显示出良好的协议得到的整体。
The evolution of nonlinear deep-water wave groups in one-horizontal dimension is studied. The strongly nonlinear Green–Naghdi (GN) models are used to simulate this phenomenon. There are different levels of the GN models depending on the different velocity assumption used for the vertical structure of the flow field, such as GN-1, GN-2, and so forth. In this work, we use both the GN-3 and GN-4 models to do the simulations. Calculations are done for three different numbers of waves per group (or packet) as the number of envelope solitons depends on the number of waves per group (N). The numerical results show that the GN-3 model can give the converged GN results for the cases tested here. We conduct a series of physical experiments to investigate the evolution of wave groups. We also use other’s experimental data and present laboratory measurements to compare the data with the predictions of the GN models and show that good agreement is obtained overall.
更高层次的GN理论在一些波动变换问题中的应用
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