Size segregation in dry granular flows of binary mixtures

Abstract

We phrase and solve a problem of particle segregation in a dry flow of two sizes of spheres down an inclined bed in a wide channel. The flow is assumed to be steady and fully-developed, collisions between particles are dissipative, and the sizes and masses of the particles are not too different. We restrict our analysis to dense flows and use an extension of kinetic theory to predict the profiles of the volume fractions of the two species. For a particular ratio of the radii and of the masses of the two species, segregation is not predicted. © 2010 American Institute of Physics.