Simulation of size segregation of granulars with two sizes in a horizontal vibrating container

The size segregation of grains is studied with two-dimensional molecular dynamic simulations for dissipative particles under horizontal vibration. A series of segregation that induced by horizontal vibrations at different amplitudes and frequencies are reported and the relationship between these two aspects is analyzed. A standard is given to scale the speed of the segregation. It is found that an optimal amplitude exists at a given frequency. An empiric formula is obtained for this amplitude. It shows that another segregation mechanism exists at a large amplitude and frequency, in which the big particles are thrown directly to the top by the side wall.EI05559-5632