Naturally I do not know your problem, but I had an analogous one with material diffusing into a nanometer scale droplet where it undergoes a chemical reaction. I made the problem dimensionless by scaling distances with the droplet radius and time with the first order reaction rate constant k, t replaced by k*t. I wonder if anything like that would be feasible for you.
Use mapped mesh if possible.
Wish this helps.
best regards
Lasse
Use mapped mesh if possible.
Wish this helps.
best regards
Lasse
