Experimental investigation of breaking criteria of deepwater wind waves under strong wind action

Sang Ho Oh, Natsuki Mizutani, Kyung Duck Suh, Noriaki Hashimoto

研究成果: Contribution to journalArticle査読

13 被引用数 (Scopus)

抄録

The present study describes an experimental investigation of breaking criteria of deepwater wind waves under strong wind action. In a wind wave flume, waves were generated using different wind speeds and measured at different locations to obtain wave trains of no, intermittent, or frequent breaking. Water particle movement and free surface elevation were measured simultaneously using a PIV system and a wave gauge, respectively. For wind waves, not all the waves measured at a fixed location are breaking waves, and the breaking of a larger wave is not guaranteed. However, the larger the wave height, the larger the probability of breaking. In order to take as many breaking waves as possible for the cases of frequent breaking, we used the waves whose heights were close to the highest one-tenth wave height. The experimental results showed that the geometric or kinematic breaking criteria could not explain the occurrence of breaking of wind waves. On the other hand, the vertical acceleration beneath the wave crest was close to the previously suggested limit value, -0.5g, when frequent breaking of large waves occurred, indicating that the dynamic breaking criterion would be good for discriminating breaking waves under a strong wind action.

本文言語英語
ページ(範囲)235-250
ページ数16
ジャーナルApplied Ocean Research
27
4-5
DOI
出版ステータス出版済み - 8 10 2005

All Science Journal Classification (ASJC) codes

  • 海洋工学

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