A numerical study of dynamics in thin hopper flow and granular jet

doi:10.1088/1674-1056/ab7807

Abstract The dynamics of granular material discharging from a cuboid but thin hopper, including the hopper flow and granular jet, are investigated via discrete element method (DEM) simulations. The slot width is varied to study its influence on the flow. It is found the flow in the cuboid hopper has similarity with the flow in two-dimensional (2D) hopper. When the slot width is large, the flowrate is higher than the predicted value from Beverloo's law and the velocity distribution is not Gaussian-like. For granular jet, there is a transition with varying slot width. For large slot width, there is a dense core in the jet and the variations of velocities and density are relatively small. Finally, the availability of continuum model is assessed and the results show that the performance with large slot width is better than that with small slot width.

Keywords: cuboid hopper granular jet velocity field discrete element method continuum model

Received: 12 January 2020
Revised: 11 February 2020
Accepted manuscript online:

PACS:

81.05.Rm

(Porous materials; granular materials)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11705256 and 11905272), the National Postdoctoral Program for Innovative Talents, China (Grant No. BX201700258), Young Scholar of CAS “Light of West China” Program for Guanghui Yang (Grant No. 2018-98), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA21010202).

Corresponding Authors: Ping Lin
E-mail: pinglin@impcas.ac.cn

Cite this article:

Meng-Ke Wang(王梦柯), Guang-Hui Yang(杨光辉), Sheng Zhang(张晟), Han-Jie Cai(蔡汉杰), Ping Lin(林平), Liang-Wen Chen(陈良文), Lei Yang(杨磊) A numerical study of dynamics in thin hopper flow and granular jet 2020 Chin. Phys. B 29 048102

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A numerical study of dynamics in thin hopper flow and granular jet

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