Experiments with granular materials are notoriously dif
fi
cult for
various reasons, e.g. their opacity, humidity effects, particle-particle
variations. Computational techniques are not vulnerable to such
factors, yet have yielded plentiful insight into numerous systems of
granular materials
[35]
. Therefore, simulations were carried out using
spheres, which closely match the glass beads used in
Fig. 5
to gain a
deeper perspective on what is going on inside the granular bed.
Quanti
fi
cationofsegregationin thesimulations ispossiblethroughout