Wind sustained viscous solitons
Résumé
We investigate the generation of wind waves at the surface of a highly viscous liquid. Contrarily to the classical lowviscosity case, we observe the intermittent formation of large localized structures that propagate rapidly downstream, which we call viscous solitons. These strongly nonlinear coherent structures propagate at a velocity given by the balance between the aerodynamic drag in the air and the viscous drag in the liquid. We propose here a model to describe their dynamics based on a subcritical bifurcation governed by the wind shear stress.
Domaines
Physique [physics]
Origine : Fichiers produits par l'(les) auteur(s)