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Runup and Overtopping Velocity due to Wave Breaking  

Ryu, Yong-Uk (River and Coast Research Division, KICT)
Lee, Jong-In (River and Coast Research Division, KICT)
Kim, Young-Taek (River and Coast Research Division, KICT)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.19, no.6, 2007 , pp. 606-613 More about this Journal
Abstract
This study investigates the behavior of a plunging wave and its associated runup and overtopping through velocity measurements and suggests an empirical formula for overtopping velocities on a structure. The plunging wave breaking in front of the structure generates very bubbly flow fields. For measurements of the two phase flow field of the breaking wave, particle image velocimetry and a modified optical method were employed. The obtained velocity fields were discussed in respect of the process of wave impinging, runup and overtopping. The overtopping velocity distribution is found to have a nonlinear profile showing a maximum magnitude at its front part. The relationship of self-similarity among dimensionless parameters is observed and used to obtain the regression formula to depict the overtopping velocity.
Keywords
hydraulic model test; particle image velocimetry technique; overtopping; runup; overtopping velocity; dimensional analysis;
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