Aggregates relaxation in a jamming colloidal suspension after shear cessation
Abstract
The reversible aggregates formation 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 particles aggregates is observed in the jamming regime, and their relaxation after shear cessation is monitored as a function of the applied shear stress. The aggregates relaxation time increases when a larger stress is applied. Several phenomena have been proposed to interpret this behavior: an increase of the aggregates size and volume fraction, or a closer packing of the particles in the aggregates.
Keywords
Cite
@article{arxiv.cond-mat/0512144,
title = {Aggregates relaxation in a jamming colloidal suspension after shear cessation},
author = {F. Ianni and D. Lasne and R. Sarcia and P. Hebraud},
journal= {arXiv preprint arXiv:cond-mat/0512144},
year = {2009}
}
Comments
7 pages, 7 figures; added figures included in the pdf version