Simulation of Inhomogeneous Columns of Beads under Vertical Vibration

Figure 6

At Γ=1.5, 𝑒=0.92, 𝑒_𝑤=1.0, and mass ratio 𝑚_𝑏/𝑚_𝑡=100 (the same as in Figure 5) the two groups of particles enter in the condensed regime upon adjusting the restitution coefficients to 𝑒_𝑏=0.92 (heavier spheres) and 𝑒_𝑡=0.82 (lighter spheres).