Open AccessVORTEX FORMATION IN PLUNGING BREAKER
Author(s) -
Tetsuro Sakai,
T. Mizutani,
Hitoshi Tanaka,
Yohei Tada
Publication year - 1986
Publication title -
proceedings of conference on coastal engineering/proceedings of ... conference on coastal engineering
Language(s) - English
Resource type - Journals
eISSN - 2156-1028
pISSN - 0589-087X
DOI - 10.9753/icce.v20.54
Subject(s) - vortex , circuit breaker , mechanics , jet (fluid) , crest , flow visualization , trough (economics) , physics , geology , vortex ring , flow (mathematics) , optics , quantum mechanics , economics , macroeconomics
By a flow visualization of a plunging breaker on 1/20 slope beach in a wave tank, an existence of 2nd and 3rd horizontal vortices(Miller, 1976) and slanting vortex (Nadaoka et al., 1986) is confirmed. A MAC method is applied to simulate a violent motion after an impinging of a jet from a crest of a plunging breaker on the trough surface. The calculated maximum water particle velocity in the jet is found to reach three times the linear long wave celerity. Values of circulation of the first four horizontal vortices are calculated and their changes in time are discussed.