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
