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Theory of Suspension Segregation in Partially Filled Horizontal Rotating Cylinders

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arxiv cond-mat/0109428 v1 pith:4ACA3O7N submitted 2001-09-24 cond-mat.soft cond-mat.mtrl-scinlin.CDphysics.flu-dyn

Theory of Suspension Segregation in Partially Filled Horizontal Rotating Cylinders

Rama Govindarajan , Prabhu R. Nott , Sriram Ramaswamy This is my paper
classification cond-mat.soft cond-mat.mtrl-scinlin.CDphysics.flu-dyn
keywords freehorizontalparticlesrotatingsegregationsurfacesuspensiontheory
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It is shown that a suspension of particles in a partially-filled, horizontal, rotating cylinder is linearly unstable towards axial segregation and an undulation of the free surface at large enough particle concentrations. Relying on the shear-induced diffusion of particles, concentration-dependent viscosity, and the existence of a free surface, our theory provides an explanation of the experiments of Tirumkudulu et al., Phys. Fluids 11, 507-509 (1999); ibid. 12, 1615 (2000).

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