Fig. 6: r measured from 86 collision events (blue and red circles) during one experiment with the overall average value indicated by the black dashed line.
From: Granular cooling of ellipsoidal particles in microgravity
When adopting the criterion of using those collision events with only unambiguously tracked trajectories before and after, 47 blue circles remain and give an average value indicated by the blue dashed line. Black triangles show the average values within every 3 s. Collision events after 30 s into cooling are too difficult to be clearly detected due to the very slow motion of the particles and possible clustering behaviors.
