Hello, everyone. I've got a question about step-75 for the use of VectorTools::interpolate_boundary_values inside solve_with_gmg() function, where mg_matrices are built.
The question is here interpolate_boundary_values uses a ZeroFunction, while the real PDE in this tutorial has non-zero Dirichlet BC on all boundaries. Why set to ZeroFunction and why the result is not impacted here? I came across this problem when I'm combining step-29 and step-75, the former inquires an Absorption Boundary Condition(ABC) so it's not Dirichlet BC everywhere. An it seems all ABC are not applied, matrix entries corresponding to boundary DoFs are non-zero only on diagonal. This implies they are treated as Dirichlet BC. Thank you -- 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/5a99e0e9-2273-49ac-89b6-ce30cbde8123n%40googlegroups.com.
