中国物理B ›› 2020, Vol. 29 ›› Issue (4): 48102-048102.doi: 10.1088/1674-1056/ab7807

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

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

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)   

  1. 1 Institute of Modern Physics, Chinese Academy of Sciences(CAS), Lanzhou 730000, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2020-01-12 修回日期:2020-02-11 出版日期:2020-04-05 发布日期:2020-04-05
  • 通讯作者: Ping Lin E-mail:pinglin@impcas.ac.cn
  • 基金资助:
    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).

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

Meng-Ke Wang(王梦柯)1,2, Guang-Hui Yang(杨光辉)1,2, Sheng Zhang(张晟)1,2, Han-Jie Cai(蔡汉杰)1,2, Ping Lin(林平)1,2, Liang-Wen Chen(陈良文)1,2, Lei Yang(杨磊)1,2   

  1. 1 Institute of Modern Physics, Chinese Academy of Sciences(CAS), Lanzhou 730000, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-01-12 Revised:2020-02-11 Online:2020-04-05 Published:2020-04-05
  • Contact: Ping Lin E-mail:pinglin@impcas.ac.cn
  • Supported by:
    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).

摘要: 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.

关键词: cuboid hopper, granular jet, velocity field, discrete element method, continuum model

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.

Key words: cuboid hopper, granular jet, velocity field, discrete element method, continuum model

中图分类号:  (Porous materials; granular materials)

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