Anders Logg wrote: > On Mon, Jun 30, 2008 at 11:44:40AM +0200, Dag Lindbo wrote: >> Anders Logg wrote: >>> On Tue, Jun 17, 2008 at 10:52:06PM +0200, Dag Lindbo wrote: >>>> Hello again! >>>> >>>> Is it correct that Periodic BCs won't work for vector-valued systems? >>>> There is a comment to suggest this in PeriodicBC.cpp. Is there a >>>> reasonable workaround for the needy? >>>> >>>> /Dag >>> I don't know of an easy workaround. >>> >>> But maybe you can take a look at the code in PeriodicBC.cpp to see if >>> it's possible to understand what it does and then extend it? I guess >>> the extension will be nontrivial, but the code is fairly well >>> documented so it should not be impossible. >> Sorry for the basic question, but I'm struggling to figure out the role >> SubSystems play in PeriodicBCs. >> >> E.g. on a Taylor-Hood element, SubSystem(1) corresponds to pressure - a >> scalar. I expected that it would be possible to apply the PBC to this >> subsystem. But if I do >> PeriodicBC bc(mesh, sub_domain, SubSystem(1)), >> and try to apply it I still get an abort that there are "more than one >> dof associated with coordinate. Did you forget to specify the subsystem?". >> >> I would greatly appreciate if someone could help to clarify this. >> >> /Dag > > Is this still an issue? >
Yes, I have not been able to make more sense of this. Sorry. /Dag
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