Jamming transitions in a schematic model of suspension rheology

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 noner...

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Bibliographic Details
Published in:Europhysics letters 2003-07, Vol.63 (2), p.240-246
Main Authors: Holmes, C. B, Fuchs, M, Cates, M. E
Format: Article
Language:English
Subjects:
64.70.Pf
83.60.Rs
Chemistry
Colloidal state and disperse state
Condensed Matter
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Physics
Soft Condensed Matter
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Summary: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.
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i2003-00465-1