Dear DEAL.II developers, I am trying to solve a Laplace problem and refine the mesh adaptively. I am using a CG solver with a symmetric Multigrid preconditioner.
I plan to transfer the solution on the initial mesh to the refined mesh, and then use the interpolated solution as the initial guess in the iterative solver of the fine mesh. But the iterative solver on the fine mesh diverges. In fact, the iterative solver always diverges unless the initial guess is small (less than 1e-7). I wonder if condense the hanging node constraints in the system assembly is the correct way to go. If needed, I can attach a smallest working example. Best Regards, Yang -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/dbee6f2f-7a9e-4cdc-b5ba-70c267ee14ccn%40googlegroups.com.
