The segregation of flowing grains is a commonly observed phenomena in industries ranging from food to pharmaceuticals to ceramics. While most works have been di- rected toward the impact of the shear force on particle segregation in the non-cohesive systems, particle mixing/segregation under both shear and cohesion forces (van der Waals forces, liquid-bridge interactions, electrostatic interactions, etc.) has received relatively little attention. In this paper, we theoretically and experimentally examine the cohesive mixing and segregation in an annular shear cell, i.e., Couette cell. We attempt to extend previous theoretical arguments for pseudo-static particle systems to sheared beds and develop phase diagrams to predict particle mixing/segregation.
展开▼
