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

作　　者：王文广 周志刚 宗谨 厚美瑛 

机构地区：[1]Key Laboratory of Soft Matter Physics,Beijing National Laboratory for Condense Matter Physics,Institute of Physics,Chinese Academy of Sciences [2]School of Physical Sciences,University of Chinese Academy of Sciences

出　　处：《Chinese Physics B》2017年第4期238-244,共7页中国物理B（英文版）

基　　金：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);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 F,and the position of the window coupling the two compartments,on the segregation and the waiting time%are investigated.It is found that the segregation observed in zero gravity exists and does not depend on the excitation strength F.The waiting time T,however,depends strongly on F：the higher the F,the lower the waiting time V,The simulation results are important in guiding the SJ-10 satellite microgravity experiments.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 F,and the position of the window coupling the two compartments,on the segregation and the waiting time%are investigated.It is found that the segregation observed in zero gravity exists and does not depend on the excitation strength F.The waiting time T,however,depends strongly on F：the higher the F,the lower the waiting time V,The simulation results are important in guiding the SJ-10 satellite microgravity experiments.

关 键 词：DEM simulation granular gas MICROGRAVITY SEGREGATION 

分 类 号：O347.7[理学—固体力学]