Transition of axial segregation patterns in a long rotating drum--颗粒学报PARTICUOLOGY

Cui, Z., Zhao, Y., Chen, Y., Liu, X., Hua, Z., Zhou, C., & Zheng, J. (2014). Transition of axial segregation patterns in a long rotating drum. Particuology, 13, 128–133. https://doi.org/10.1016/j.partic.2013.02.013

Zequn Cui ^a, Yongzhi Zhao ^a *, Youchuan Chen^a b, Xiao Liu ^a, Zhengli Hua ^a, Chilou Zhou ^a, Jinyang Zheng ^a

a State Key Laboratory of Chemical Engineering, Institute of Process Equipment, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, China
b Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

10.1016/j.partic.2013.02.013

Volume 13, April 2014, Pages 128-133

Received 26 September 2012, Revised 22 November 2012, Accepted 5 February 2013, Available online 12 July 2013.

E-mail: yzzhao@zju.edu.cn

Highlights

• Axial segregation of bidisperse mixture of particles is studied using DEM.

• End wall effect can induce particle bands at the end walls.

• Frictionless end walls promote formation of small-particle band.

• Particle bands far from the ends are mainly influenced by particle interaction.

• Competition between end wall effect and particle interaction determines axial segregation patterns.

Abstract

Axial segregation of a bidisperse mixture of particles in a long rotating drum is studied using the discrete element method. Simulation results show that particle interaction is responsible for axial segregation, the patterns of which are influenced by the end wall effect. Axial segregation patterns transform under competing influences of the end walls and the particle interaction forces. The two influential factors vary with various rotational speeds and end wall friction levels. The result is the transition of different axial segregation patterns: two large-particle bands at both ends, two small-particle bands at both ends, or a random segregation pattern where either a large-particle band or small-particle band may appear at either end.

Graphical abstract

Keywords

Long rotating drum; Discrete element method; Axial segregation pattern; End wall effect; Rotational speed

文章导读