摘要
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.
基金
The National Natural Science Foundation of China(grant numbers 11872333,11272061,91852205)
the Natural Science Foundation of Zhejiang Province(grant number LR19A020001)
the Fundamental Research Funds for Central Universities(grant number 2017ZY37)are acknowledged for financial supports.
