Integration of size separation and transport of granular particles by a posts array on a conveyor belt

We experimentally design an integrated system composed of a conveyor belt and a posts array, which can simultaneously implement the function of size separation and transportation of disk particles. Differently sized particles through the post array exhibit two types of distinct migration modes that are responsible for the size separation. Furthermore, the dividing line between the two migration modes depends on the critical radius found in experiment. The relationship between the separation efficiency and the length of the post array and the packing fraction of particles is investigated quantitatively. Finally, a simplified model is proposed to predict a critical particle radius which is verified to be in accordance with experimental measurements. This research has a potential application prospect in some fields of industry. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

An integrated system of a conveyor belt and a posts array is experimentally designed for size separation and transportation of disk particles. Different sized particles exhibit distinct migration modes through the post array, depending on a critical radius found in experiment. The relationship between separation efficiency, post array length, and particle packing fraction is investigated quantitatively.