
Can FEATool be used to solve Fick's diffusion PED using nonlinear concentration dependent diffusion? I have tried a 1D problem using realistic numbers (C0 of 1e20 and D0 of 1e11) using a flux boundary on the left and get a result, but only after hours of solution time (time dependent, internal solver, 0.2 time step for 1000 total time)
Any comments to help me understand this would be welcome.
Thanks.
