Kinematics of extreme waves in deep water

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• 作者：Grue ; John ; Clamond ; Didier ; Huseby ; Morten ; Jensen ; Atle
• 关键词：Wave kinematics ; Extreme waves ; PIV
• 刊名：Applied Ocean Research
• 出版年：2003
• 期刊代码：15_01411187
• 类别：et
• 出版时间：December, 2003
• 卷：25
• 期：6
• 页码：355-366
• 文件大小：362 K

摘要

The velocity profiles under crest of a total of 62 different steep wave events in deep water are measured in laboratory using particle image velocimetry. The waves take place in the leading unsteady part of a wave train, focusing wave fields and random wave series. Complementary fully nonlinear theoretical/numerical wave computations are performed. The experimental velocities have been put on a nondimensional form in the following way: from the wave record (at a fixed point) the (local) trough-to-trough period, T_TT and the maximal elevation above mean water level, η_m of an individual steep wave event are identified. The local wavenumber, k and an estimate of the wave slope, are evaluated from ω²/(gk)=1+², kη_m