Figure 3
From: Collision-enhanced friction of a bouncing ball on a rough vibrating surface
(Figure prepared using Veusz https://veusz.github.io).
The effect of the wall. (a) Histograms of \(v_x/R\omega _z\) for a simulated bouncing ball immediately after (red) or without (blue) a preceding collision with a wall. (b) Probability density plot as a function of the position in the cell on a log–log scale. The magenta plot shows the case of a rolling ball which undergoes an elastic collision with the cell walls. Both the remaining plots have zero tangential friction coefficient which stops the ball rotating. These simulations are done with an elastic (yellow) and inelastic (cyan) wall collision. Rolling results in a much larger density enhancement at the wall than inelasticity. The density profile shows a power law like dependence.
