Journal article
Laboratory experiments on the effects of a variable current field on the spectral geometry of water waves
H Rapizo, T Waseda, AV Babanin, A Toffoli
Journal of Physical Oceanography | AMER METEOROLOGICAL SOC | Published : 2016
Abstract
Laboratory experiments were performed to investigate the effects of a coflowing current field on the spectral shape of water waves. The results indicate that refraction is the main factor in modulating wave height and overall wave energy. Although the structure of the current field varies considerably, some current-induced patterns in the wave spectrum are observed. In high frequencies, the energy cascading generated by nonlinear interactions is suppressed, and the development of a spectral tail is disturbed, as a consequence of the detuning of the four-wave resonance conditions. Furthermore, the presence of currents slows the downshifting of the spectral peak. The suppression of the high-fr..
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Grants
Awarded by Office of Naval Research
Funding Acknowledgements
We thank the support and assistance of Mr. Itakura and Kent Mozumbi during the experiments in the University of Tokyo wave tank. We are thankful to Amin Chabchoub for the advice and help on the experimental setup. The support of ONR Grant N000141310278 and of the Australian Research Council through Discovery Grant DP130100227 is acknowledged by A.V.B.; T.W. and A.T acknowledge support from the JSPS Fellowship for Research in Japan Program, Grants-in-Aid for Scientific Research of the JSPS, and the International Science Linkages (ISL) Program of the Australian Academy of Science. The first author is thankful for support from the Australian Victorian Government through the Victorian International Research Scholarship.