Elmer Discussion Forum

Hi,
I have tried to run the version of the problem published in GitHub: viewtopic.php?f=3&t=7507&start=20, but I don't know why it doesn't work
-What does "Integer BC" mean?
-Why does the convergence monitor plot nothing?
Regards,
Andrea

Hi

The "integer bc varname" was just a new keyword I added to enable integral constraints where the integral over a boundary is known but not the shape of the distribution.

There are three test cases "IntegralConstraint*" and those are all the examples that exist for this new type of BC. So far there is no documentation.

-Peter

Thanks, Peter, when I leave empty a boundary condition, what does a natural boundary condition mean? Is a Dirichlet or Neumann condition?
-Andrea

Natural BC or the do-nothing condition is zero Neumann condition. -Peter