Abstract
An investigation of frictional, Platonic solid-shaped particle flows on inclined planes is performed using the discrete element method, and the effects of particle angular shape on rheological properties are analyzed. Higher shear stresses at a specified depth of particle bed are obtained for more angular particles. As particle angularity increases, rapid surges in the coordination number and solid-phase stresses occur at a smaller critical solid volume fraction. The friction and dilatancy laws of polyhedral particle flows are significantly different from those of spherical particle flows, due to particle angularity. Nevertheless, by applying a specific rolling friction to the spherical particles, their rheological properties can match those of the polyhedral particles, indicating that the angular particle shape plays a similar role to the rolling friction in preventing particle rotation. Thus, the flows of spherical particles with a rolling friction incorporated can be used to mimic the flows of angular polyhedral particles. At last, a scaling law is adopted to describe rheological relations for various polyhedral particles based on a bulk friction coefficient, a dimensionless granular temperature, and an inertial number.
Funder
National Natural Science Foundation of China
Zhejiang Provincial Outstanding Youth Science Foundation
Fundamental Research Funds for the Central Universities
Specialized Research Projects of Huanjiang Laboratory
Subject
Condensed Matter Physics,Fluid Flow and Transfer Processes,Mechanics of Materials,Computational Mechanics,Mechanical Engineering
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献