Directory:
    ${PENCIL_HOME}/samples/2d-tests/gray_scott
SVN Id:
    $Id$
Maintainer:
    Axel Brandenburg <brandenb/nordita[dot]org>
Added:
    10-Mar-2008
Status:
    works since 10-Mar-2008
Recommended resolution:
    256^2 with chem_diff=1e-5, chem_diff_prefactor=2.,1.
    initchem='innerbox', amplchemk=1.,0., amplchemk2=.5,.25, widthchem=.1
Comments:
    Reaction-diffusion equations, showing cell splitting etc.
    dU/dt = D*del2(U) - U*V^2 + A(1-U)
    dV/dt = D*del2(V) + U*V^2 - B*V
    Double precision is not really important, except for auto-testing
Reference:
    J.E. Pearson (1993, Science, 261, 189-192,
    Complex Patterns in a Simple System)