Some considerations on the rheology of dense frictional cylindrical particles--颗粒学报PARTICUOLOGY

Li, S., Hao, J., Li, Y., & Guo, Y. (2023). Some considerations on the rheology of dense frictional cylindrical particles. Particuology, 72, 58-67. https://doi.org/10.1016/j.partic.2022.02.005

Some considerations on the rheology of dense frictional cylindrical particles

Shiming Li ^a, Jiahui Hao ^{a b}, Yanjie Li ^a *, Yu Guo ^b

a School of Technology, Beijing Forestry University, Beijing 100083, China
b Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China

10.1016/j.partic.2022.02.005

Volume 72, January 2023, Pages 58-67

Received 9 August 2021, Revised 6 February 2022, Accepted 14 February 2022, Available online 28 February 2022, Version of Record 7 May 2022.

E-mail: liyanjie@bjfu.edu.cn

Highlights

• Rheology of frictional true cylindrical particles is investigated using DEM simulations.

• Particle aspect ratio and interparticle friction affect bulk friction coefficient-inertial number correlation.

• Particle size polydispersity affects bulk friction coefficient-inertial number correlation.

• Effects of particle properties on rheological behaviors vary in different flow regimes.

Abstract

Discrete element method simulations of granular shear flows of frictional cylindrical particles are performed. From the simulations, solid-phase pressure, shear stress, and bulk friction coefficient

μ can be measured, allowing the investigation of the effects of particle properties on the macroscopic flow behaviors. Thus, the inertial number I based rheological models, which were frequently used for the spherical particles in the previous work, are examined for the applicability to cylindrical particles in the present study. It is found that the particle aspect ratio, interparticle friction coefficient, and particle size polydispersity all affect the bulk friction coefficient-inertial number correlation and the solid volume fraction-inertial number correlation, and their effects vary in different flow regimes, which exhibit different mechanical behaviors.

Graphical abstract

Keywords

Cylindrical particle flow; Granular rheology; Binary flow; Discrete element method

文章导读