FitzHugh-Nagumo model. Two spirals interaction

a b ε dt dx d path

it delay fps
Two spirals interaction. d is the initial burning strip length (in pixels). On 2D plane positive u values are displayed by the red color (negative "tail" is not shown). v values are displayed by the green color. In 1 second the script begins to plot the path of the spiral wave tips.

One more example.

Heart rhythms     updated 2 Mar 2012