Random advection in a fractal medium with finite correlation length.
We investigate tracer advection in fractal media with finite correlation length. The process is superdiffusive at early times and transforms to a classical diffusion regime later. At large time the spatial tail of the concentration has a two-stage structure with a long-distant part corresponding to superdiffusive regime.
Kondratenko
Peter S
PS
Nuclear Safety Institute, Russian Academy of Sciences, Moscow, Russia.
Matveev
Leonid V
LV