Kinematics of the mixing of granular material in slowly rotating containers
The Pearlstone Center for Aeronautical Engineering Studies,
Department of Mechanical Engineering, Ben-Gurion University of the Negev,
P.O. Box 653, Beer-Sheva 84105, Israel
Accepted: 13 May 1998
The mixing of granular material in a two-dimensional slowly rotating container is studied using a kinematic approach. A simple model is proposed to estimate the mixing capacity of a mixer when the particles diffusivity is small. Different geometries of the container are examined numerically. The mixing rate index for the case of a circular drum is derived analytically. The optimum shape of the container and the optimum filling level are discussed.
PACS: 46.10.+z – Mechanics of discrete systems / 05.60.+w – Transport processes: theory / 83.70.Fn – Granular solids
© EDP Sciences, 1998