期刊
ANNUAL REVIEW OF FLUID MECHANICS, VOL 52
卷 52, 期 -, 页码 121-144出版社
ANNUAL REVIEWS
DOI: 10.1146/annurev-fluid-010816-060128
关键词
concentrated suspensions; rheology; shear thickening; jamming; lubrication; friction
资金
- National Science Foundation division of Chemical, Bioengineering, Environmental and Transport Systems [1605283]
- NEMESIS Chair d'Attractivite at the Universite Toulouse III (Universite Paul Sabatier)
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1605283] Funding Source: National Science Foundation
Shear thickening is the increase of the apparent viscosity as shear rate or shear stress increases. This phenomenon is pronounced in concentrated (dense) suspensions of both colloidal-scale and larger particles, with an abrupt form, known as discontinuous shear thickening, observed as the maximum flowable solid fraction is approached. An overview of observed shear thickening behavior is presented, with a discussion of present understanding of the relationship of suspension shear thickening to granular jamming. Mechanistic arguments for the extreme change in rheological properties are outlined, and recent evidence from experiment and simulation for the role of contact forces is presented. Interactions of particles by fluid mechanical lubrication, contact, and steric and electrostatic forces, together with extreme stresses that may lead to solid deformation, require consideration of surface interactions and their tribological consequences in describing shear thickening.
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