Hi Martin Thank you for the answer. Now I understand. I changed the maxit number to 2000 and the program advanced another cycle, but eventually gave the same error. So, now my question would be, how many iterations are too many? I mean, it is ok to increment maxit number to 3000, 4000, or more? Regarding the preconditioning step, the program uses the Jacobi method. Is the selection of the preconditioner method mesh dependent? I'm not sure if these are naive questions, if so, I appreciate your patience.
Regards Javier El jue, 12-01-2012 a las 16:41 +0100, Martin Stoll escribió: > Hi Javiear, > > I would guess that the solver cound not obtain the desired tolerance > with the maximal number of iterations maxit=1000 number of iterations. > In principal, you can increase the number of maxit as already > suggested or you can make your system "nicer" by considering > preconditioning. > http://en.wikipedia.org/wiki/Preconditioner > > Best, > Martin _______________________________________________ dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii
