Questions about MHD Problem

Numerical methods and mathematical models of Elmer
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Andrea_P
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Questions about MHD Problem

Post by Andrea_P »

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
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raback
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Re: Questions about MHD Problem

Post by raback »

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
Andrea_P
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Re: Questions about MHD Problem

Post by Andrea_P »

Thanks, Peter, when I leave empty a boundary condition, what does a natural boundary condition mean? Is a Dirichlet or Neumann condition?
-Andrea
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Re: Questions about MHD Problem

Post by raback »

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