https://doi.org/10.1140/epje/s10189-022-00207-0
Regular Article - Flowing Matter
Size segregation of disk particle in two-dimensional chute
1
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
Received:
7
January
2022
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