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Publication Citation: Stress propagation in a colloidal suspension under shear

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Author(s): William L. George; Pascal Hebraud; Didier Lootens; Mouhamad Khalil; Nicos Martys;
Title: Stress propagation in a colloidal suspension under shear
Published: March 01, 2012
Abstract: The stress propagation in a concentrated attractive colloidal suspension, under shear, is studied using mumerical simulations. A novel way of describing the intercolloidal stress field is proposed and its spatial correlations are studied. An inertia-like tensor is defined in order to characterize the anisotropic nature of the stress field. It is shown that, although the particles remain in a liquid order, the interparticle stress is strongly anisotropic. A transition under flow is observed~: at low deformations, the stress propagates along the compression direction of the shear, whereas at high deformations, the stress is organized into layers parallel to the flow direction.
Citation: European Physical Journal E
Keywords: Rheology; Yield Stress; Colloids; Granular Fluids
Research Areas: Condensed Matter Physics