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

• 来源期刊: 中国物理B（英文版）
• 关键词: DEM simulation granular gas microgravity segregation
• 年，卷（期）: 2017,（4）
• 页码范围: 238-244
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/4/044501

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 τ 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 τ,however,depends strongly on Γ:the higher the F,the lower the waiting time τ.The simulation results are important in guiding the S J-10 satellite microgravity experiments.