The CA

This is the Diffusion-Limited Aggregation cellular automaton model. Particles (blue) diffuse around in the grid, i.e. move randomly. When a blue particles touchs a green solid particle, it also turns green and "sticks" (aggregates), i.e. stops moving. A branching structure grows over time. The shape of the branching structure depends on the initial density of blue particles.

The Controls

See the parent web page for general controls.

Controls specific to this particular applet are:

• Particle density: a percentage, saying what fraction of sites will contain blue particles when you reset the system.
• Place particles: press this button to reset the system using the given particle density (or you can press "Enter" in the particle density text field).