| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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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 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 |
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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.
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Received: 27 November 2016
Revised: 30 January 2017
Accepted manuscript online:
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PACS:
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45.70.-n
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(Granular systems)
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45.70.Mg
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(Granular flow: mixing, segregation and stratification)
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| Fund: 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). |
Corresponding Authors:
Meiying Hou
E-mail: mayhou@iphy.ac.cn
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Cite this article:
Wenguang Wang(王文广), Zhigang Zhou(周志刚), Jin Zong(宗谨), Meiying Hou(厚美瑛) DEM simulation of granular segregation in two-compartment system under zero gravity 2017 Chin. Phys. B 26 044501
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