Regular Article - Flowing Matter
Size segregation of disk particle in two-dimensional chute
Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, China
2 School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China
Accepted: 13 May 2022
Published online: 14 June 2022
Size segregation will lead to stratification of a particle system. At present, people have not fully understood the segregation mechanism. In this work, we have studied the size segregation behavior of two-component disk particles in chute flows. The effects of particle size ratio η, particle density ρ, static friction coefficient μ and chute angle α on size segregation are discussed. We use the discrete element method to simulate and calculate the force of disk large particles during segregation. Results show that the ‘squeeze expulsion’ mechanism plays a key role in the size segregation of a disk particle flow. We establish a physical model of ‘squeeze expulsion’ of disk particles and obtain the conditions for the formation of ‘squeeze expulsion’ mechanism.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022