中国物理B ›› 2017, Vol. 26 ›› Issue (4): 44501-044501.doi: 10.1088/1674-1056/26/4/044501

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

DEM simulation of granular segregation in two-compartment system under zero gravity

Wenguang Wang(王文广), Zhigang Zhou(周志刚), Jin Zong(宗谨), Meiying Hou(厚美瑛)   

  1. 1 Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condense Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2016-11-27 修回日期:2017-01-30 出版日期:2017-04-05 发布日期:2017-04-05
  • 通讯作者: Meiying Hou E-mail:mayhou@iphy.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11474326 and 11274354), the "Strategic Priority Research Program-SJ-10" of the Chinese Academy of Sciences (Grant No. XDA04020200), and the Special Fund for Earthquake Research of China (Grant No. 201208011).

DEM simulation of granular segregation in two-compartment system under zero gravity

Wenguang Wang(王文广)1,2, Zhigang Zhou(周志刚)1,2, Jin Zong(宗谨)1, Meiying Hou(厚美瑛)1,2   

  1. 1 Key Laboratory of Soft Matter Physics, Beijing National Laboratory for Condense Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-11-27 Revised:2017-01-30 Online:2017-04-05 Published:2017-04-05
  • Contact: Meiying Hou E-mail:mayhou@iphy.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11474326 and 11274354), the "Strategic Priority Research Program-SJ-10" of the Chinese Academy of Sciences (Grant No. XDA04020200), and the Special Fund for Earthquake Research of China (Grant No. 201208011).

摘要:

In this paper, granular segregation in a two-compartment cell in zero gravity is studied numerically by DEM simulation. In the simulation using a virtual window method we find a non-monotonic flux, a function which governs the segregation. A parameter is used to quantify the segregation. The effect of three parameters: the total number of particles N, the excitation strength Γ, and the position of the window coupling the two compartments, on the segregation and the waiting time τ are investigated. It is found that the segregation observed in zero gravity exists and does not depend on the excitation strength Γ. The waiting time τ, however, depends strongly on Γ: the higher the Γ, the lower the waiting time τ. The simulation results are important in guiding the SJ-10 satellite microgravity experiments.

关键词: DEM simulation, granular gas, microgravity, segregation

Abstract:

In this paper, granular segregation in a two-compartment cell in zero gravity is studied numerically by DEM simulation. In the simulation using a virtual window method we find a non-monotonic flux, a function which governs the segregation. A parameter is used to quantify the segregation. The effect of three parameters: the total number of particles N, the excitation strength Γ, and the position of the window coupling the two compartments, on the segregation and the waiting time τ are investigated. It is found that the segregation observed in zero gravity exists and does not depend on the excitation strength Γ. The waiting time τ, however, depends strongly on Γ: the higher the Γ, the lower the waiting time τ. The simulation results are important in guiding the SJ-10 satellite microgravity experiments.

Key words: DEM simulation, granular gas, microgravity, segregation

中图分类号:  (Granular systems)

  • 45.70.-n
45.70.Mg (Granular flow: mixing, segregation and stratification)