Schematic models for dynamic yielding of sheared colloidal glasses
Abstract
The nonlinear rheological properties of dense suspensions are discussed within simplified models, suggested by a recent first principles approach to the model of Brownian particles in a constant-velocity-gradient solvent flow. Shear thinning of colloidal fluids and dynamical yielding of colloidal glasses arise from a competition between a slowing down of structural relaxation, because of particle interactions, and enhanced decorrelation of fluctuations, caused by the shear advection of density fluctuations. A mode coupling approach is developed to explore the shear-induced suppression of particle caging and the resulting speed-up of the structural relaxation.
Cite
@article{arxiv.cond-mat/0207530,
title = {Schematic models for dynamic yielding of sheared colloidal glasses},
author = {Matthias Fuchs and Michael E. Cates},
journal= {arXiv preprint arXiv:cond-mat/0207530},
year = {2015}
}
Comments
33 pages, 10 figures; accepted for publication in Faraday Disc. 123 (2002); small numerical corrections