Rheology of Viscoelastic Suspensions of Rigid Spheres

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• Prof Pier Luca Meffettone
• Friday 24 November 2006, 14:15-15:15
• IRC in Superconductivity Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Dr Kalin Dragnevski.

Suspensions of particles in liquids are a class of materials relevant in a variety of applications. A variegate spectrum of rheological properties is observed depending on concentration of particles, their mechanical properties, shape, and size, and on the rheology of the suspending liquid. In this work we consider a suspension of buoyancy free, inertialess, rigid, nonBrownian spherical inclusions in viscoelastic liquids. Several rheological predictions are analytically derived through a perturbative approach with the Deborah number, De, as the perturbation parameter. These predictions are confirmed by 3D numerical simulations, which also describe situations at higher De-values. Good agreement is found with a variety of experimental data found in the literature.

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