Karma model. 1D travelling waves

We include diffusion term D ΔE = D ∂2E / ∂x2 to get running waves
    t E = DΔE + F(E, n) = DΔE + [A - (n/nb)M][1 - tanh(E - 3)]E2/2 - E,
    ∂t n = H(E, n) = ε [Θ(E - 1) - n].

M nb ε Δt Δx D speed

Ymin Ymax delay it fps
This script uses simple explicit algorithm. It makes it time steps per frame.

See also speed variations.


Heart rhythms     updated 4 Dec 2011