Coupling between aging and convective motion in a colloidal glass of Laponite - ENS de Lyon - École normale supérieure de Lyon Accéder directement au contenu
Article Dans Une Revue The European Physical Journal B: Condensed Matter and Complex Systems Année : 2007

Coupling between aging and convective motion in a colloidal glass of Laponite

Résumé

We study thermal convection in a colloidal glass of Laponite in formation. Low concentration preparation are submitted to destabilizing vertical temperature gradient, and present a gradual transition from a turbulent convective state to a steady conductive state as their viscosity increases. The time spent under convection is found to depend strongly on sample concentration, decreasing exponentially with mass fraction of colloidal particles. Moreover, at fixed concentration, it also depends slightly on the pattern selected by the Rayleigh Bénard instability: more rolls maintain the convection state longer. This behavior can be interpreted with recent theoretical approaches of soft glassy material rheology.
Fichier principal
Vignette du fichier
LaponiteConvection.pdf (697.1 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

ensl-00121535 , version 1 (21-12-2006)
ensl-00121535 , version 2 (26-01-2007)
ensl-00121535 , version 3 (19-02-2007)

Identifiants

Citer

Ludovic Bellon, Mathieu Gibert, Rodrigo Hernández. Coupling between aging and convective motion in a colloidal glass of Laponite. The European Physical Journal B: Condensed Matter and Complex Systems, 2007, 55, pp.101-107. ⟨10.1140/epjb/e2007-00049-y⟩. ⟨ensl-00121535v3⟩
86 Consultations
200 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More