Prediction of segregation characterization based on granular velocity and concentration in rotating drum

In a binary granular system composed of two types of particles with different granule sizes and the same density, particle sorting occurs easily during the flow process. The segregation pattern structure is mainly affected by the granular velocity and granular concentration in the flow layer. This paper reports on the experimental velocity and concentration measurement results for spherical particles in a quasi-twodimensional rotating drum. The relationship between the granular velocity along the depth direction of the flow layer and granular concentration was established to characterize structures with different degrees of segregation. The corresponding relationships between the granular velocity and concentration and the segregation pattern were further analyzed to improve the theoretical models of segregation (convection-diffusion model and continuous flow model) and provide a reference for granular segregation control in the production process. (c) 2022 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

Automated summary

This paper investigates particle sorting in a binary granular system composed of particles with different sizes and the same density. The segregation pattern is mainly influenced by the granular velocity and concentration in the flow layer. Experimental measurements of velocity and concentration were conducted in a quasi-two-dimensional rotating drum to establish the relationship between granular velocity and concentration, and to analyze the corresponding relationships with the segregation pattern. This research aims to improve theoretical models of segregation and provide guidance for granular segregation control in production processes.