An experimental and numerical study of the spatial evolution of unidirectional nonlinear water-wave groups
An experimental and numerical study of the spatial evolution of unidirectional nonlinear water-wave groups
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DOI：
10.1063/1.1501908
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发表时间：
2002-08
影响因子：
4.6
通讯作者：
L. Shemer;E. Kit;H. Jiao
中科院分区：
文献类型：
--
作者：
L. Shemer;E. Kit;H. Jiao
在波浪池中对非线性窄谱深水波群的空间演化进行了实验研究。实验结果与基于单向Zakharov方程和Dysthe模型的计算结果进行了比较。基于两种模型的计算结果与实验结果非常吻合，这促使人们尝试对更宽的初始谱宽进行模拟，这正式违反了dythe模型推导中采用的假设。用不受谱宽限制的Zakharov方程的解验证了Dysthe模型计算结果的准确性。得出了关于Dysthe模型的有效域的结论。
Spatial evolution of nonlinear narrow-spectrum deep-water wave groups is studied experimentally in a wave tank. The experimental results are compared with the computations based on the unidirectional Zakharov equation and the Dysthe model. The very good agreement between the computational results based on both models with the experiments prompted an attempt to perform simulations for a wider initial spectral width, that formally violate the assumptions adopted in the derivation of the Dysthe model. The accuracy of the results based on the Dysthe model is checked against the solutions of the Zakharov equation, which is free of restrictions on the spectral width. Conclusions regarding the domain of validity of the Dysthe model are drawn.