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Écoulement et ségrégation dans des pâtes granulaires modèle

Abstract : We study the shear induced segregegation phenomena in non colloidal concentrated
suspensions containing different sizes of particles. Particles are heavier than the fluid,
as in most of practical situations (slurries, concrete, solid rocket propellants. . .). In our
experiments, we use a transparent model material and are able to measure velocity and
concentration fields under shear.

In simple shear geometries (Couette cell and parallel-plate), we observe that the main
(i.e. azimuthal) flow is generally localized. Besides we demonstrate the systematic existence
of a non-azimuthal component of the trajectories.

We experimentally establish the relationship between segregation patterns, primary and
secondary flows. Upon this basis, we discuss the possible mechanisms of segregation.
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Contributor : Marie Lenoble <>
Submitted on : Saturday, January 28, 2006 - 10:30:54 PM
Last modification on : Thursday, January 11, 2018 - 6:14:59 AM
Long-term archiving on: : Saturday, April 3, 2010 - 9:56:53 PM



  • HAL Id : tel-00011486, version 1



Marie Lenoble. Écoulement et ségrégation dans des pâtes granulaires modèle. Dynamique des Fluides [physics.flu-dyn]. Université Sciences et Technologies - Bordeaux I, 2005. Français. ⟨tel-00011486⟩



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