Dynamic analysis of blockage behavior of fine particles in a packed bed by discrete element method

The dynamic blockage behaviour of fine particles in a packed bed was simulated using the discrete element method (DEM). The influence of key variables are examined. The calculation results showed that fine particles blockage in packed bed are easy to occur in the area where fine particles just enter...

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Bibliographic Details
Published inIronmaking & steelmaking Vol. 48; no. 7; pp. 860 - 867
Main Authors She, Xuefeng, Liu, Songhao, Liu, Yanjun, Zhao, Wenshu, Wang, Yanjiang, Zhou, Heng
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 09.08.2021
SAGE Publications
Subjects
blockage behaviour
bottleneck particles
clogging ratio
DEM
Fine particles
blockage behaviour
clogging ratio
bottleneck particles
DEM
Fine particles
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Summary:The dynamic blockage behaviour of fine particles in a packed bed was simulated using the discrete element method (DEM). The influence of key variables are examined. The calculation results showed that fine particles blockage in packed bed are easy to occur in the area where fine particles just enter the bed. The mechanism of blockage formation is mainly due to mechanical interactions between fine particles, which can create arches on packed bed and stop the flow. When the fine particles form a bridge across the pore throat of the orifice, the bottleneck of void space becomes the starting point for blockage formation. The fine particles with a larger rolling friction coefficient have a higher clogging ratio. With the increase in charging fine particles, the fine particles experience more collisions with each other, and the clogging ratio increases. The initial velocity of fine particles also has an impact on the blockage behaviour.
ISSN:0301-9233
1743-2812
DOI:10.1080/03019233.2021.1880035