Experimental evidence of the modulation of a plane wave to oblique perturbations and generation of rogue waves in finite water depth
Toffoli, A. ; Fernandez, L. ; Monbaliu, J. ; Benoit, M. ; Gagnaire-Renou, E. ; Lefèvre, Jean-Michel ; Cavaleri, L. ; Proment, D. ; Pakozdi, C. ; Stansberg, C. T. ; Waseda, T. ; Onorato, M.
Année de publication
2013
We present a laboratory experiment in a large directional wave basin to discuss the instability of a plane wave to oblique side band perturbations in finite water depth. Experimental observations, with the support of numerical simulations, confirm that a carrier wave becomes modulationally unstable even for relative water depths k 0 h < 1.36 (with k the wavenumber of the plane wave and h the water depth), when it is perturbed by appropriate oblique disturbances. Results corroborate that the underlying mechanism is still a plausible explanation for the generation of rogue waves in finite water depth.
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