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Chin. Phys. B, 2018, Vol. 27(12): 124704    DOI: 10.1088/1674-1056/27/12/124704
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Numerical simulations of dense granular flow in a two-dimensional channel:The role of exit position

Tingwei Wang(王廷伟), Xin Li(李鑫), Qianqian Wu(武倩倩), Tengfei Jiao(矫滕菲), Xingyi Liu(刘行易), Min Sun(孙敏), Fenglan Hu(胡凤兰), Decai Huang(黄德财)
Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
Abstract  

Molecular dynamics simulations have been performed to elucidate the influence of exit position on a dense granular flow in a two-dimensional channel. The results show that the dense flow rate remains constant when the exit is far from the channel wall and increases exponentially when the exit moves close to the lateral position. Beverloo's law proves to be successful in describing the relation between the dense flow rate and the exit size for both the center and the lateral exits. Further simulated results confirm the existence of arch-like structure of contact force above the exit. The effective exit size is enlarged when the exit moves from the center to the lateral position. As compared with the granular flow of the center exit, both the vertical velocities of the grains and the flow rate increase for the lateral exit.

Keywords:  granular materials      dense granular flow      molecular dynamics simulations  
Received:  25 July 2018      Revised:  19 September 2018      Published:  05 December 2018
PACS:  47.57.Gc (Granular flow)  
  45.70.Mg (Granular flow: mixing, segregation and stratification)  
  75.40.Mg (Numerical simulation studies)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant No. 11574153).

Corresponding Authors:  Decai Huang     E-mail:  hdc@njust.edu.cn

Cite this article: 

Tingwei Wang(王廷伟), Xin Li(李鑫), Qianqian Wu(武倩倩), Tengfei Jiao(矫滕菲), Xingyi Liu(刘行易), Min Sun(孙敏), Fenglan Hu(胡凤兰), Decai Huang(黄德财) Numerical simulations of dense granular flow in a two-dimensional channel:The role of exit position 2018 Chin. Phys. B 27 124704

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