Measurements of surface kinematics and temperature in the surf and swash zones using infrared image velocimetry

Zhi Cheng Huang, Kao-Shu Hwang, Luc Lenain, W. Kendall Melville, Hwung Hwang Hwung

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

High intensity air bubbles generated in the surf zone and the thinning of swash flow make velocity measurements particularly challenging in coastal areas. These facts have led the need for a new measurement technique to quantify the surf and swash flow dynamics. Here, we tested infrared image techniques to measure the surface temperature and then to derive the velocity fields using cross-correlation algorithm for large-scale solitary waves breaking in the surf and swash zones. From the comparison with unspiked electromagnetic current meter (EMCM) data and previous validation, it is suggested that the infrared image velocimetry (IRIV) is satisfactory to quantify the surface turbulent flow in the surf and swash zones. The data obtained in the experiment provides a new description of surface thermal structure and kinematics for solitary breaking waves. Two-dimensional organized streaks of temperature structures are evident on the water surface behind the head of rebounding jet. Wavenumber spectrum analysis shows that the directionality of these thermal signatures evolves with time. Evolution of vorticity on the water surface during the run-up and run-down process of the solitary broken wave is discussed.

原文English
主出版物標題Proceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012
出版狀態Published - 2012 12月 1
事件33rd International Conference on Coastal Engineering 2012, ICCE 2012 - Santander, Spain
持續時間: 2012 7月 12012 7月 6

出版系列

名字Proceedings of the Coastal Engineering Conference

Other

Other33rd International Conference on Coastal Engineering 2012, ICCE 2012
國家/地區Spain
城市Santander
期間12-07-0112-07-06

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 海洋工程
  • 海洋學

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