Jamming transitions in a schematic model of suspension rheology

Details Jamming transitions in a schematic model of suspension rheology Jamming transitions in a schematic model of suspension rheology

2002-10-15

arxiv.org/abs/cond-mat/0210321v3

Physics

Condensed Matter

Soft Condensed Matter

7 pages; 3 figures; improved version with added references. Accepted for publication in Europhysics Letters

Scientific paper

10.1209/epl/i2003-00465-1

We study the steady-state response to applied stress in a simple scalar model of sheared colloids. Our model is based on a schematic (F2) model of the glass transition, with a memory term that depends on both stress and shear rate. For suitable parameters, we find transitions from a fluid to a nonergodic, jammed state, showing zero flow rate in an interval of applied stress. Although the jammed state is a glass, we predict that jamming transitions have an analytical structure distinct from that of the conventional mode coupling glass transition. The static jamming transition we discuss is also distinct from hydrodynamic shear thickening.

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