title: Relaxation of jammed colloidal suspensions after shear cessation.
abstract: The dynamics of heterogeneities in a shear thickening, concentrated colloidal suspension is investigated through speckle visibility spectroscopy, a dynamic light scattering technique recently introduced [P. K. Dixon and D. J. Durian, Phys. Rev. Lett. 90, 184302 (2003)]. Formation of shear-induced heterogeneities is observed in the jamming regime, and their relaxation after shear cessation is monitored as a function of the applied shear stress. The relaxation time of these heterogeneities increases when a higher stress is applied.
authors.affiliation: P.P.M.D., UMR 7615 ESPCI, 10 rue Vauquelin 75231, Paris Cedex 05, France. francesca.ianni@phys.uniroma1.it
authors.forename: Francesca
authors.initials: F
authors.lastname: Ianni
authors.forename: David
authors.initials: D
authors.lastname: Lasne
authors.forename: Régis
authors.initials: R
authors.lastname: Sarcia
authors.forename: Pascal
authors.initials: P
authors.lastname: Hébraud