Mechanisms and kinetics of gravity separation of granular materials

Particle separation mechanisms and kinetics in granular materials in a gravity chute and under vibrational impact are analyzed. Special attention is given to separation and kinetics mechanisms operating under conditions of high heterogeneity of structural and kinematic characteristics of granular flows. An analysis of alternative expressions for the separation driving force arising from local and spatial heterogeneity of granular media is based on results of experimental and analytical studies. Predictive properties of mathematical models are discussed with reference to the dynamics of separation of granular media according to the size and density of their constituent particles due to shear flow heterogeneity.