On Wed, Jan 20, 2016 at 4:29 PM, Junchao Zhang <junchao.zh...@gmail.com>
wrote:

> I guess that is because the input mesh is read from a file in
> adaptivity_ex2,
> however the input file does not boundary info.
>

That's correct, there are no boundary ids in mesh.xda.



> I am trying to add this to the input file. It looks the format of .xda
> files is not well documented.
>

Check out, e.g. reference_elements/3D/one_hex.xda, the boundary conditions
are at the end of the xda file, and I think they are (elem,side,id)
triplets.

6        # number of boundary conditions
0 0 1
0 1 2
0 2 3
0 3 4
0 4 5
0 5 6






-- 
John
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