
		VIBRATION

A common phenomena observed in granular materials is particle size
segregation. I.e., that the larger particles move to the surface under
vibration of the bottom plate. If the density of the larger particle(s)
is smaller than that of the smaller ones, the effect is clearly
understandable due to Archimedes' principle. But for a configuration
of equal density or even when the density of the larger particle(s) is
slightly larger than that of the smaller ones one can observe size
segregation. The speed of this phenomena depends on a lot of different
parameters, e.g. shape, density, but the most crucial driving
mechanism is the difference in particle diameter.

One can choose two different setups, one with one large particle and
the second one with two large particles. The colors are proportional to
the velocities of the particles where the big one(s) are not filled to
make them clearer visible.

Unfortunately, the effect is not clearly visible for the configuration
since the borders are to close and the number of particles is not
enough. But this will be taken care of in the future.

/*
	MolecularDynamics;
	Forces;
	Hopper;
	Billiard;
