Theory of small aspect ratio waves in deep water Auteur(s): Kraenkel A., Léon J., Manna M. (Article) Publié: Physica D: Nonlinear Phenomena, vol. 211 p.377-390 (2005) Texte intégral en Openaccess : Ref HAL: in2p3-00149077_v1 Ref Arxiv: nlin/0512057 DOI: 10.1016/j.physd.2005.09.001 WoS: 000233340400009 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 8 Citations Résumé: In the limit of small values of the aspect ratio parameter (or wave steepness) which measures the amplitude of a surface wave in units of its wave-length, a model equation is derived from the Euler system in infinite depth (deep water) without potential flow assumption. The resulting equation is shown to sustain periodic waves which on the one side tend to the proper linear limit at small amplitudes, on the other side possess a threshold amplitude where wave crest peaking is achieved. An explicit expression of the crest angle at wave breaking is found in terms of the wave velocity. By numerical simulations, stable soliton-like solutions (experiencing elastic interactions) propagate in a given velocities range on the edge of which they tend to the peakon solution. Commentaires: LaTex file, 16 pages, 4 figures |