I have placed some non-VRML animations related to my work on hard-particle packings on this webpage. They are pretty much a random collection of animations. After a long search for a good movie format for scientific animations, I discovered the truly wonderful MNG format (like animated GIF but for PNG):

http://www.libpng.org/pub/mng

I use mngplay under Linux and IrfanView for Windows.

On this webpage there are also older animated GIFs and MPEG 2 animations, which should be standard for any system. They are not nearly as nice as the MNG ones however.

- MD of hard-sphere FCC crystal at phi=0.70 (MPEG) and of hard-sphere dense liquid at phi=0.49 (MPEG). Also hard-disk crystal (MPEG) and hard-disk liquid (MPEG).
- Illustration of the Lubachevsky-Stillinger algorithm for ellipses (MNG) and for ellipsoids (MMs!) inside a spherical container (MNG) and for superellipsoidal cubes (MNG).
- Here is an MRI scan of a real (experimental) ellipsoid packing (MNG).

- Illustration of the use of near-neighbor lists (NNLs) in the MD
algorithm (MNG).

- Illustration of the formation of force chains in the jamming
limit for a binary hard-disk packing (MNG).

- Compressing monodisperse disks with a fixed unit cell produces
nearly triangular polycrystalline packings with line deffects (GIF).

Including deformations of the unit cell (Parinello-Rahman-type MD) leads to perfect triangular packings with some vacancies (GIF). - Here is an illustration of the working of the free-energy BCMD
algorithm for disks (MNG) and
for ellipses (MNG).

- Illustration of the concept of jamming as configurational trapping: A disk is locally jammed among three fixed disks (MNG), or it is not jammed and an unjamming motion exists (MNG).
- A hard-disk packing was produced by freezing some of the disks
(purple). It has a low density phi~0.84 and appears jammed at first
sight. However, running MD reveals that it is not and an unjamming
motion becomes apparent---the new jamming density is closer to phi~0.9 (GIF).

- A collectively jammed disk packing (with rattlers removed) is not strictly jammed, as apparent when running MD with a deformable unit cell (lattice vectors) (GIF).
- For ellipsoids the picture is more complicated: This ellipse is
locally jammed, but barely so (MNG).

- A collectively jammed disk packing is stretched to make an
ellipse packing. It is no longer jammed, as MD demonstrates (GIF).

- The strictly jammed triangular disk crystal is stretched to make an ellipse packing. It is no longer strictly jammed, since it can be continuously sheared (GIF).

- The density of a random domino tiling is slowly increased from
liquid to jamming: N=5000 (GIF)
and N=1250 (GIF).

- The density of a random domino tiling is slowly reduced from
close packing to liquid densities using MD (GIF).

- A nematic domino tiling changes density from close packing to
liquid (GIF).

- Melting of binary phase-separated hard-disk crystal:

At phi=0.775 melting is incomplete (MNG), but

at phi=0.763 melting is complete, though slow (MNG)

- For binary hard disks phi~0.8 is the kinetic glass transition
density, and relaxatio dynamics of a supercooled liquid is very slow (MNG),
but at density phi=0.775 the dynamics is liquid-like, with long-time
diffusion and complete mixing (ergodicity?) (MNG).

- Similarly, a partially-clustered (micro-segregated) nonequilibrium binary disk system at phi=0.8 is stable over long MD runs (MNG), but at a density phi=0.775 it demixes completely (though slowly) (MNG).
- Illustration of the conversion of a partitioning of the
monodisperse triangular crystal into small and large disks into a
binary packing of disks: no clustering (MNG),
medium clustering (MNG), lots
of clustering (MNG).