Figure 5
From: Flux of granular particles through a shaken sieve plate
Granular particles flow through the plate on which sieve holes are arranged in the pattern of 2-D square grid with hole diameter 2.5 mm. (a) Mean mass flux 
as a function of the vibration strength 
is shown. (b) Rescaled flux is plotted as a function of the vibration frequency f for different vibration strengths 
on a log-log scale. The blue dashed line 1/f is drawn to guide the eye.
