Dear Kilian,
1.) You should be able to use more recent versions of gmsh if you go to File ->
Export. If you name your grid *.msh
there will be an option to chose the older Version II ASCII format, readable by
Dumux.
Thank you!
2.) Have you tried an unstructured grid with quadrilaterals? According to the
header where the error comes from,
only quadrilaterals are supported (at least, this is what some comments in the
code suggest). You can force gmsh to
use only quads (also unstructured ones).
I just tried an unstructured quad grid and got the same error. However,
a gmsh-generated structured quad grid went fine, which means that there
is no trouble with gmsh itself.
Good news: using FVPressureTwoPAdaptive instead of FvMpfaL2dPressureTwoP
allowed me to use an gmsh-generated unstructured grid (both triangular
and quadrilateral). I am wondering whether MPFA-L in DuMux "officially"
requires a structured quad grid.
Best regards,
Dmitry
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