Finite-size effects in parametric subharmonic instability

Abstract : The parametric subharmonic instability in stratified fluids depends on the frequency and the amplitude of the primary plane wave. In this paper, we present experimental and numerical results emphasizing that the finite width of the beam also plays an important role on this triadic instability. A new theoretical approach based on a simple energy balance is developed and compared to numerical and experimental results. Because of the finite width of the primary wave beam, the secondary pair of waves can leave the interaction zone which affects the transfer of energy. Experimental and numerical results are in good agreement with the prediction of this theory, which brings new insights on energy transfers in the ocean where internal waves with finite-width beams are dominant.
Liste complète des métadonnées

Littérature citée [20 références]  Voir  Masquer  Télécharger

https://hal-ens-lyon.archives-ouvertes.fr/ensl-01064683
Contributeur : Sylvain Joubaud <>
Soumis le : mercredi 17 septembre 2014 - 10:24:09
Dernière modification le : jeudi 19 avril 2018 - 14:54:04
Document(s) archivé(s) le : jeudi 18 décembre 2014 - 10:11:57

Fichiers

Finite_size_PSI_ref2_v2_nocolo...
Fichiers produits par l'(les) auteur(s)

Licence


Copyright (Tous droits réservés)

Identifiants

Citation

Baptiste Bourget, Hélène Scolan, Thierry Dauxois, Michael Le Bars, Philippe Odier, et al.. Finite-size effects in parametric subharmonic instability. Journal of Fluid Mechanics Digital Archive, Cambridge University Press, 2014, 759, pp.739-750. 〈10.1017/jfm.2014.550〉. 〈ensl-01064683〉

Partager

Métriques

Consultations de la notice

239

Téléchargements de fichiers

105