Laboratory measurement of void fraction under a breaking solitary wave in the surf zone

Lian Tang, Yun Ta Wu, O. W.H. Wai, Pengzhi Lin

研究成果: Conference contribution

摘要

The temporal and spatial variations of the void fraction under a breaking solitary wave on a 1:20 sloping beach was investigated through laboratory measurement. The fiber optic reflectometer (FOR) was applied to measure the instantaneous void fraction inside the bubble plume in the experiment. A high-speed camera was used to capture the whole process of the bubbly flow passing through the region where the FOR instrumented. The void fraction distributions in the splash up and cavity areas were well captured by the FOR technique in the experiment. The measured maximum ensemble averaged void fraction occurred in the collapsing cavity area with the maximum value of 65% after wave broke. The ensemble averaged void fraction was more than 20% in the fully mixed region in the surf zone and sustained for a long duration of time. The time series of the measured ensemble averaged void fraction had good synchronization with the instantaneous images taken by high speed camera, so that the correlation between fluid density and velocity variations can be further investigated.

原文English
主出版物標題APAC 2019 - Proceedings of the 10th International Conference on Asian and Pacific Coasts
編輯Nguyen Trung Viet, Tran Thanh Tung, Dou Xiping
發行者Springer
頁面823-828
頁數6
ISBN(列印)9789811502903
DOIs
出版狀態Published - 2020
事件10th International Conference on Asian and Pacific Coasts, APAC 2019 - Hanoi, Viet Nam
持續時間: 2019 9月 252019 9月 28

出版系列

名字APAC 2019 - Proceedings of the 10th International Conference on Asian and Pacific Coasts

Conference

Conference10th International Conference on Asian and Pacific Coasts, APAC 2019
國家/地區Viet Nam
城市Hanoi
期間19-09-2519-09-28

All Science Journal Classification (ASJC) codes

  • 海洋科學
  • 生態學、進化論、行為學與系統學
  • 生態學

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