[Dune] Boundary IDs of the faces of a cube within the DGF file

[Sacconi, Andrea]

Hi everybody,

I would like to ask you a question about how to prescribe boundary IDs within a DGF file.
I just had a closer look at the DGF format, but I couldn't find how to do what I need.

Let's say that the domain for your computations is a cube (or a rectangular cuboid, it doesn't matter), and you want to impose different boundary conditions on the six faces.
In order to do that, I would introduce different boundary IDs to be read in the code, to guarantee that the faces are treated accordingly.

If you want to assign the same ID to all the faces of elements lying on a certain big face of the cube, is it possible to do it directly, without enumerating all those faces?
I mean, in 2D there is the excellent command "Interval".
What happens if I use the keyword "Interval" (in 3D), passing the four segments forming the perimeter of the (big) face?

Thanks in advance!

Andrea
__________________________________________________________

Andrea Sacconi
PhD student, Applied Mathematics
AMMP Section, Department of Mathematics, Imperial College London,
London SW7 2AZ, UK
a.sacconi11 at imperial.ac.uk
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