DEM simulation of particle mixing in a sheared granular flow--颗粒学报PARTICUOLOGY

Lu, L.-S., & Hsiau, S.-S. (2008). DEM simulation of particle mixing in a sheared granular flow. Particuology, 6(6), 445–454. https://doi.org/10.1016/j.partic.2008.07.006

DEM simulation of particle mixing in a sheared granular flow

Li-Shin Lu ^a, Shu-San Hsiau ^b *

a Department of Mechanical Engineering, Technology and Science Institute of Northern Taiwan, Taipei 11202, Taiwan, China
b Department of Mechanical Engineering, National Central University, Chung-Li 32001, Taiwan, China

10.1016/j.partic.2008.07.006

Volume 6, Issue 6, December 2008, Pages 445-454

Received 24 March 2008, Accepted 15 July 2008, Available online 8 November 2008.

E-mail: sshsiau@cc.ncu.edu.tw

Highlights

Abstract

Mixing behaviors of particles are simulated in a sheared granular flow using differently colored but otherwise identical glass spheres, with five different bottom wall velocities. By DEM simulation, the solid fractions, velocities, velocity fluctuations and granular temperatures are measured. The mixing layer thicknesses are compared with the calculations from a simple diffusion equation using the data of apparent self-diffusion coefficients obtained from the current simulation measurements. The calculations and simulation results showed good agreements, demonstrating that the mixing process of granular materials occurred through the diffusion mechanism.

Graphical abstract

Keywords

DEM; Particle mixing; Sheared granular flow; Diffusion

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