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

• Published in: Powder technology Vol. 392; pp. 438 - 447
• Main Authors: Zhou, Jiawei, Shangguan, Linjian, Gao, Kuidong, Wang, Yanhua, Hao, Yongxing
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-11-2021; Elsevier BV
• Subjects: Coarse particle; Conveying; Dense phase pneumatic conveying; Exchanging; Pneumatic conveyors; Pneumatics; Slug characteristics; Slug flow; Slugs; Velocity; Slug flow; Dense phase pneumatic conveying; Slug characteristics; Coarse particle
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2021.07.024

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°degree and 74.6°, respectively.
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•Coarse particles slug flow pneumatic conveying process were simulated.•A light medium mixed flow pneumatic conveying for coarse particles was introduced.•Slugs continuously update and roll forward accompanying particles exchanging.•Rear angle could be used as an indicator to identify whether slug formation.