Freely cooling granular gas
CLUSTERING IN A FREELY COOLING GRANULAR GAS
Snapshots and animations from an event-driven (ED) simulation
with N=99856 particles in 2D and periodic boundary conditions.
The system has volume fraction v=0.25 and it cools due to dissipation
so that 10 per-cent of the relative velocity is lost per collision,
i.e., the restitution coefficient is r=0.9.
IMAGE of the collision rate in the clustered regime (small 1.62 MB)
Red, green and blue correspond to large, medium and small values, respectively.
ANIMATION of the collision rate (small 2.62 MB)
ANIMATION of energy, collision rate and diffusion/mixing (XLARGE 102.0 MB)
Reference (additional reading):
S. Luding, Structure and cluster formation in granular media
Pramana-J. of Phys. 64(6), 893-902, 2005,
gzipped ps file ] or
PDF file ] or
journal-format PDF (access restriction) ].