Fractal diffusion front in a bidimensional medium obtained by means of a random walk process [Front fractal de diffusion dans un milieu bidimensionnel obtenu grâce à un processus de marche aléatoire].




A source of particles (with constant concentration) is located far below the bottom line of the exhibited square lattice. Frome time to time, each particle is free to move to one of its four neighbour sites -East, South, West and North- on the condition this site is free. After a long simulation time, five subsets of sites can be defined:




See the 'Island-Peninsula' phenomenon:

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See the particle density (pi/2 rotated: the particle source is on the left hand side):




(this picture was created on 04/07/2007)
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