Characteristics of propagation and evolution of plunging solitary waves

被引：0
|
作者：
Tai B. [1 ]
Ma Y. [1 ]
Dong G. [1 ]
Ma X. [1 ]
机构：
[1] Institute of Ocean Engineering, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2021年 / 42卷 / 06期
关键词：
Evolution; Image analysis; Model experiment; Plunging jet; Plunging wave; Shoaling effect; Solitary wave; Wave breaking;
D O I：
10.11990/jheu.202003007
中图分类号：
学科分类号：
摘要：
Plunging waves, which can induce destructive power in the sea, have complex propagation processes. Experiments were carried out to get an insight into the evolution characteristics of plunging solitary waves. First, solitary waves were generated in a wave flume, subsequently evolving into plunging waves via the shoaling effect. Besides, various water depths and wave heights were selected before recording images of the wave propagation process using a high-speed camera, and an image analysis based on the open-source computer vision library, OpenCV, was then used to extract and analyze the wave surface contours. The results showed that through the images after the plunging jet forms, instabilities at the inner surface were found. These instabilities then caused the water drop due to complete shedding or formed water thread due to partial shedding. The OpenCV can extract the surface contours of breaking waves, and it showed that the wave surface contours of solitary plunging waves prior to breaking could remain constant, which worked for different water depths and heights. In addition, as the steepness of the wave increased, the plunging jet evolved with a longer distance and showed a more inclined angle as imping on the free water surface, thus swallowing more air into the water. Copyright ©2021 Journal of Harbin Engineering University.
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页码：778 / 784
页数：6
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