Simulation of Inhomogeneous Columns of Beads under Vertical Vibration

Figure 7

At Γ=10, 𝑒=0.67, 𝑒_𝑤=1.0, and mass ratio 𝑚_𝑏/𝑚_𝑡=100, the lower portion of the column becomes fluidized, while the upper half part remains in the condensed regime.