Prediction of segregation characterization based on granular velocity and concentration in rotating drum--颗粒学报PARTICUOLOGY

Xiu, W., Li, R., Chen, Q., Sun, Q., Zivkovic, V., & Yang, H. (2023). Prediction of segregation characterization based on granular velocity and concentration in rotating drum. Particuology, 73, 17-25. https://doi.org/10.1016/j.partic.2022.03.008

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

Wenzheng Xiu^a, Ra Li b ^a, Quan Chen ^a, Qicheng Sun ^c, Vladimir Zivkovic ^d, Hui Yang ^a *

a School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
b School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
c State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China
d School of Engineering, Newcastle University, NE1 7RU, United Kingdom

10.1016/j.partic.2022.03.008

Volume 73, February 2023, Pages 17-25

Received 29 October 2021, Revised 22 February 2022, Accepted 16 March 2022, Available online 4 May 2022, Version of Record 16 May 2022.

E-mail: yanghui@usst.edu.cn

Highlights

• A bidisperse segregation model of granular velocity and concentration was established.

• Granular velocity and granular concentration were measured.

• The model characterizes different degrees of segregation.

Abstract

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-two-dimensional 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.

Graphical abstract

Keywords

Granular segregation; Rotating drum; Granular velocity; Granular concentration

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