Évolution de l'enveloppe de type soliton pulsé de Peregrine d'un groupe de vagues : approches analytique et expérimentale.

Hubert Branger (1) , Amin Chabchoub (2) , Norbert Hoffmann (2) , Nail Akhmediev (3) , Olivier Kimmoun (1) , Christian Kharif (1)

1 IRPHE - Institut de Recherche sur les Phénomènes Hors Equilibre
2 HUT - Hamburg University
3 Res Sch Phys Sci & Engn, Opt Sci Grp

Benjamin-Feir (1967) modulational instabilities can lead to the onset of recurrent extreme waves (breather) whose amplitude may exceed three to five times the amplitude of the initial wave-train. We conducted experiments in different wave tanks to simulate breather formation and propagation. Breathers are correctly generated, even the high order soliton pulses with amplification greater than 5. By shifting by 180 ° the carrier phase, the large crest becomes an extreme through. In finite depth, it is possible to maintain in the tank the propagation of a dark soliton (quiet zone between two groups of waves). Finally, the first tests carried out in the presence of wind show that the breather is not damped by the wind.

Mots clés: waves; water waves; wind waves; breather; soliton pulsé; facility; wave facility; rogue waves; Black soliton; white soliton

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]; Océan, Atmosphère

Hubert Branger, Amin Chabchoub, Norbert Hoffmann, Nail Akhmediev, Olivier Kimmoun, et al.. Évolution de l'enveloppe de type soliton pulsé de Peregrine d'un groupe de vagues : approches analytique et expérimentale.. 13èmes journées de l’hydrodynamique, Nov 2012, Chatou, France. pp.1-12. ⟨hal-00760321⟩