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Experiments and Numerics of Bichromatic Wave Groups

AuthorsWesthuis, J., Groesen, E. van, Huijsmans, R.
Conference/JournalJournal of Waterway, Port, Coastal and Ocean Engineering
Date1 Dec 2001

This paper reports on extensive experiments on nonlinear wave groups that evolve in a hydrodynamic laboratory over long distances (200 m) from the generation of simple bichromatic waves. The deepwater experiments show large deformations of the wave group, with large increase of wave heights, depending on the value for the quotient of wave amplitude and frequency difference. The experimental results show little dissipation and reflections are virtually absent. A very efficient and accurate numerical code based on the full nonlinear surface wave equations, which has been developed for this purpose, reconstructs the experiments and enables one to investigate the evolution over much longer distances (reported here until 1,200 m) than in the laboratory.


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