Am Dienstag, 10. September 2019 13:26:56 UTC+2 schrieb Bruno Blais: > > I second Wolfgang comment on the fact that Q1Q1 is not difficult to > implement. You can also scale it to arbitrary Qn-Qn elements if you are > interested in higher order. > We have implemented such an approach in our code based on dealii ( > https://github.com/lethe-cfd/lethe) > Q1Q1 is already very diffusive (which is why it is so robust I guess), so > I am not sure that going with Q1-Q0 to save a few pressure degree of > freedom is actually worth it. > Best! > Bruno >
Thanks Bruno, also very appreciated! I have been looking for dealii implementations of NS, since especially the stabilizations (not only inf-sup but SUPG GLS or similar) are always a bit tricky ... or at least what is considered/or may be ignored! I totally agree, that saving a few pressure dofs does not pay off, especially since I am having vector<dim>-valued velocities and displacements and only the single pressure ... The motivation was solely coming from the fact, that I did not think of using FE_nothing, otherwise I would not have started trying to use Q1Q0. Kind regards, Richard -- 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 dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/d01d6cf4-70d4-45aa-93ed-c2a63e5bae66%40googlegroups.com.
