Uskate-noise-immunity.mp4

Gray-Scott reaction diffusion system, with parameters F=0.0600 and k=0.0609. This movie demonstrates the immunity of the "U-shaped moving pattern" to systematic random noise.
At each frame (which is 73.5 dimensionless time units) the U and V values at each grid point are altered by a random amount. Beginning at about 3 seconds into the movie, the noise begins at a magnitude of 1.0e-3. Each 10 seconds (11000 dimensionless time units in the simulation) this noise amplitude is doubled. Near the end of the movie the noise is so strong that the U-shaped patterns begin to be destroyed. The noise amplitude is brought back down to 1.0e-3 for a few seconds to show that the remaining U-shape is capable of recovering.
More info at http://mrob.com/pub/comp/xmorphia

Category:

Science & Technology

Tags:

• xmorphia
• reaction
• diffusion
• Gray-Scott
• noise
• moving
• pattern