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

英文摘要：

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 ε 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: Higher the Γ, lower the waiting time τ. The simulation results are important in guiding the SJ-10 satellite microgravity experiments.