Theory of Suspension Segregation in Partially Filled Horizontal Rotating Cylinders
arXiv:cond-mat/0109428 · doi:10.1063/1.1418362
Abstract
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).
Accepted for publication in Phys Fluids (Lett) 10 pages, two eps figures