Marking Boundary Nodes in Triangulation

[Chen R]

Hi all,

So I am trying to use dealii together with our own geometric modeling environment to do different FE calculations on.

I am transferring our geometry into the Triangulation object based on the way that the read_msh function does.

The problem is that I want to keep track of boundary nodes so as later, after calculating some solution to a problem (for example an elasticity problem on the object) I want to only show graphically the changes on the boundaries of the geometry as, for example through some color map, those are the only parts of the geometry that are shown. 

I know the Triangulation object has some property of boundary IDs that can be used but how exactly to use it I'm not sure?

Thank you,

Chen

[Jean-Paul Pelteret]

Hi Chen,

Is the DoFTools::extract_boundary_dofs() function perhaps what you’re looking for?

Best,

Jean-Paul

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