Convective and Absolute Eckhaus Instability Leading to Modulated Waves in a Finite Box
Résumé
We report experimental study of the secondary modulational instability of a one-dimensional nonlinear traveling wave in a long bounded channel. Two qualitatively different instability regimes involving fronts of spatio-temporal defects are linked to the convective and absolute nature of the instability. Both transitions appear to be subcritical. The spatio-temporal defects control the global mode structure.
Domaines
Physique [physics]
Origine : Fichiers produits par l'(les) auteur(s)
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