Radial segregation of a gaussian-dispersed mixture of superquadric particles in a horizontal rotating drum

The mixing and segregation of granular materials are essential for industrial design and applications. In this work, the superquadric equation is used to construct spherical and non-spherical particles, and the discrete element method is used to investigate the radial segregation characteristics of a gaussian-dispersed mixture ina horizon -tal rotating drum. The influences of particle shape, standard deviation of the mixture, and rotating speed on the segregation behaviors are discussed by the gyration degree and mixing index. The results reveal that small and large particles are respectively distributed in the center and periphery of the drum, while the medium-sized par-ticles are evenly distributed in the system. Larger standard deviation, smoother particle shape, and smaller rota-tion speed are conducive to the segregation of granular systems. When the granular system is close to the high -speed centrifugal state, the smallest particles have the largest radial velocity and are close to the drum wall. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study reveals that the segregation behavior of granular materials is influenced by particle shape, standard deviation of the mixture, and rotating speed. Small and large particles tend to be distributed in the center and periphery of the drum, while medium-sized particles are evenly distributed in the system.