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

• 来源期刊: 中国物理B（英文版）
• 关键词: cuboid hopper granular jet velocity field discrete element method continuum model
• 年，卷（期）: 2020,（4）
• 页码范围: 561-572
• 页数: 12页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab7807

摘要

The dynamics of granular material discharging from a cuboid but thin hopper, including the hopper fl ow and granular jet, are investigated via discrete element method (DEM) simulations. The slot width is varied to study its infl uence on the fl ow. It is found the fl ow in the cuboid hopper has similarity with the fl ow in two-dimensional (2D) hopper. When the slot width is large, the fl owrate 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.