The wave energy concentration at the Agulhas current off South Africa

被引:189
作者
Lavrenov, IV [1 ]
机构
[1] Arctic & Antarctic Res Inst, St Petersburg 199397, Russia
关键词
freak waves; Agulhas current; ship collision; wave energy; modelling of wave transformation on current;
D O I
10.1023/A:1007978326982
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The case of a freak wave collision with the ship in the Agulhas current is described. The explanation of the appearance of the freak wave as a result of wind-wave transformation in the Agulhas current is given. Swell is captured and intensified by the counter-current and is located in the neighbourhood of the maximum value of the current velocity, as a result of which there is a great concentration of wave-energy density. The superposition of wind and sea with swell transformed by the current promotes the formation of the freak waves. Using a simple mathematical analysis, an optimal ship track is proposed which could reduce the risk of collision with a freak wave.
引用
收藏
页码:117 / 127
页数:11
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