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Hi Antonio,

On 24/06/2015 11:11, Antonio Garcia-Uceda wrote:
> I'm digging a bit into the pyFR data structure. Concerning the
> import of mesh files, I've noticed that pyFR creates, for each
> boundary patch, a list of tuples of four elements of the form:
> *(b'elem_type', idCell, ???, n-part). *I can't figure out the
> meaning of the third element. Could you please let me know this?

The form of the tuple is (ele-type, ele-num, face-num, flags).  The
final element, flags, is unused and set to 0.

> Also, pyFR create another list of tuples of the same form, with
> the header *'con_npart'. *What does this section refer to?

This encodes interior connectivity --- including periodic connectivity.

> Finally, Could you please spot the place where pyFR works out the 
> connections between periodic boundary patches?

This is never done by PyFR.  Periodic connectivity is encoded in the
con arrays and so is never computed directly.  It is all done during
the mesh generation phase.

Regards, Freddie.

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