Journal
POWDER TECHNOLOGY
Volume 356, Issue -, Pages 858-870Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2019.09.033
Keywords
Curved hopper; Discrete element method; Contraction rate; Flow characteristics; Froude number
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Funding
- Chinese Natural Science Foundation [11802057]
- Natural Science Foundation of Heilongjiang Province of China [LC2018010]
- Special Fund Project for Scientific and Technological Innovation Talents of Harbin, China [2017RAQXJ073]
- Young Talents Project of Northeast Agricultural University, China [18QC21]
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The jamming of particles during the silo discharge is a long-standing problem. The silo with a curved hopper can effectively prevent jamming. In this work, discrete element method was used to study the effect of contraction rate on the discharge flow characteristics in the silo with a curved hopper. Froude number was adopted to evaluate the flowability of the silo. It was found that a smaller contraction rate is propitious to granular flows. Particularly, the contraction rate was found to have a distinguishing point. Meanwhile, the effectiveness of the distinguishing point is experimentally confirmed. Moreover, the discharge rates of the curved hopper and the conical hopper under the same conditions were compared. Finally, the mathematical model between the contraction rate and Froude number was established. Understanding of the flow mechanism is useful to the design, scale-up and optimization of the silo with a curved hopper and similar structural devices. (C) 2019 Elsevier B.V. All rights reserved.
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