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An experimental comparison of velocities underneath focussed breaking waves
Alberello, A.; Chabchoub, A.; Monty, J.P.; Nelli, F.; Lee, J.H.; Elsnab, J.; Toffoli, A. (2018). An experimental comparison of velocities underneath focussed breaking waves. Ocean Eng. 155: 201-210. https://dx.doi.org/10.1016/j.oceaneng.2018.02.049
In: Ocean Engineering. Pergamon: Elmsford. ISSN 0029-8018; e-ISSN 1873-5258, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    Waves; Surface gravity waves; Wave focussing; Velocity; Kinematics; Wave breaking
Auteurs  Top 
  • Alberello, A.
  • Chabchoub, A.
  • Monty, J.P.
  • Nelli, F.
  • Lee, J.H.
  • Elsnab, J.
  • Toffoli, A., meer
Abstract
    Nonlinear wave interactions affect the evolution of steep wave groups, their breaking and the associated kinematic field. Laboratory experiments are performed to investigate the effect of the underlying focussing mechanism on the shape of the breaking wave and its velocity field. In this regard, it is found that the shape of the wave spectrum plays a substantial role. Broader underlying wave spectra leads to energetic plungers at a relatively low amplitude. For narrower spectra waves break at higher amplitudes but with a less energetic spiller. Comparison with standard engineering methods commonly used to predict the velocity underneath extreme waves shows that, under certain conditions, the measured velocity profile strongly deviates from engineering predictions.
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