Science

Movie of a 3-d vibrated system with 32768 particles with effective volume fraction (nu_0 in my notes) 0.00037, single-column stacked height (N_h) 10.6 and coefficient of restitution 0.86603 (or inelasticity parameter 0.25).  Notice the alternate realigning of the convective roll along the two horizontal axes.

Movie of a 3-d vibrated system with 131072 particles with effective volume fraction (nu_0 in my notes) 0.00037, single-column stacked height (N_h) 10.6 and coefficient of restitution 0.86603 (or inelasticity parameter 0.25)