From coherent shocklets to giant collective incoherent shock waves in nonlocal turbulent flows

Abstract : Understanding turbulent flows arising from random dispersive waves that interact strongly through nonlinearities is a challenging issue in physics. Here we report the observation of a characteristic transition: strengthening the nonlocal character of the nonlinear response drives the system from a fully turbulent regime, featuring a sea of coherent small-scale dispersive shock waves (shocklets) towards the unexpected emergence of a giant collective incoherent shock wave. The front of such global incoherent shock carries most of the stochastic fluctuations and is responsible for a peculiar folding of the local spectrum. Nonlinear optics experiments performed in a solution of graphene nano-flakes clearly highlight this remarkable transition. Our observations shed new light on the role of long-range interactions in strongly nonlinear wave systems operating far from thermodynamic equilibrium, which reveals analogies with, for example, gravitational systems, and establishes a new scenario that can be common to many turbulent flows in photonic quantum fluids, hydrodynamics and Bose–Einstein condensates.
Type de document :
Article dans une revue
Nature Communications, Nature Publishing Group, 2015, 6, n°8131 - 10 p. <http://www.nature.com/ncomms/2015/150907/ncomms9131/abs/ncomms9131.html>. <10.1038/ncomms9131>
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01263734
Contributeur : Philippe Macé <>
Soumis le : jeudi 28 janvier 2016 - 10:49:26
Dernière modification le : mardi 11 octobre 2016 - 14:02:45

Identifiants

Collections

Citation

G. Xu, D. Vocke, D. Faccio, J. Garnier, T. Roger, et al.. From coherent shocklets to giant collective incoherent shock waves in nonlocal turbulent flows. Nature Communications, Nature Publishing Group, 2015, 6, n°8131 - 10 p. <http://www.nature.com/ncomms/2015/150907/ncomms9131/abs/ncomms9131.html>. <10.1038/ncomms9131>. <hal-01263734>

Partager

Métriques

Consultations de la notice

34