Numerical study of slug characteristics for coarse particle dense phase pneumatic conveying

The slug characteristics of dense phase pneumatic conveying of coarse particles were numerically studied on the basis of experimental verification. A light medium mixed flow pneumatic conveying was introduced to improve the slug formation. The slug conveying process, the slug and particles motion during slug formation, and the slug shape characteristics were evaluated. Three points are worth highlighting: (1) Slugs are continuously updated and rolled forward accompanied by exchange of particles exchanging. (2) Slug velocity increases with the slug conveying process, and the gap between particle velocity and slug velocity gradually declines. (3) The rear angle shows obvious segregated distribution for formed slug and collapsed slug, with the mean values of 37.0 degrees degree and 74.6 degrees, respectively. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study numerically investigated the slug characteristics of dense phase pneumatic conveying of coarse particles based on experimental verification, introducing a light medium mixed flow pneumatic conveying to improve slug formation. The study highlighted the continuous updating and rolling forward of slugs with particle exchange, the increasing slug velocity throughout the conveying process, and the segregated distribution of rear angles for formed and collapsed slugs.