The last time I talked to @benkirk (which was a long time ago...) he'd indicated they used this feature very regularly. It may have been for only a single variable group, but I can't say for sure. We definitely need to exercise this more I think (and I'm also guilty of not really doing it when really I should be).
On Thu, May 10, 2018 at 9:44 AM, David Knezevic <david.kneze...@akselos.com> wrote: > On Thu, May 10, 2018 at 9:38 AM, Roy Stogner <royst...@ices.utexas.edu> > wrote: > > > > > On Wed, 9 May 2018, John Peterson wrote: > > > > On Wed, May 9, 2018 at 11:56 AM, Linda G <li...@nacad.ufrj.br> wrote: > >> > >> Dear Libmesh Users, > >>> > >>> We are trying to figure out how to set up a Stabilized NS FEM > formulation > >>> to work > >>> in a blocked matrix fashion. After reading the documentation we > realized > >>> that this boils down to define a > >>> variable group, but we could not find any example (even the Elasticity > >>> ones) that uses the > >>> block matrix (*BAIJ) feature. > >>> Please remember that our formulation is stabilized, so we are using > P1P1 > >>> and P2P2 for velocity and pressure. > >>> Is the function to define variables groups a member of System class or > >>> DofMap class? > >>> Please if anyone has a working example, or teach us how to do it, we > >>> really > >>> appreciate. > >>> > >>> > >> If I understand correctly, this should happen automatically if you have > a > >> System with 1 variable group that contains more than 1 var, provided > that > >> you configure libmesh with --enable-blocked-storage. The default is > >> --disable-blocked-storage since I believe we ran into some issues while > >> using this option in the past. > >> > > > > https://github.com/libMesh/libmesh/issues/703 is the only concrete > > issue I can find, thanks to SourceForge mailing list changes breaking > > old archive links. > > > > We should probably track this down soon so we can at least upgrade > > blocked-storage from "enable only explicitly" to "enable with > > --enable-everything". I haven't been testing --enable-blocked-storage > > for a long time so it may have regressed even further. > > --- > > Roy > > > > Should we re-open #703 then? I agree that we never got to the bottom of > what was going on there, we just avoided the issue by disabling some > examples. > > David > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Libmesh-users mailing list > Libmesh-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
