In your geo file, you can check orientation of boundary normals by adding
Geometry.Normals = 100; // adjust 100 if needed
Then check that all normals are pointing outward. If some surface has opposite
normal, then flip sign
for example, if
Line Loop(53) = {17, 18, -1, -16};
Ruled Surface(54) = {53};
this surface has wrong normal, define it as
Ruled Surface(54) = {-53};
I think fixing this orientation should fix your issue.
best
praveen
> On 09-Mar-2021, at 11:03 PM, [email protected] <[email protected]>
> wrote:
>
>
> I am wondering what meshing software produces output files that would work
> best with deal.ii. I have tried Gmsh, but it seems when this mesh (generated
> by Gmsh) is imported in deal.ii, it is facing the issue of negative volume
> fraction of a cell (could be because of the order of nodes written in Gmsh?).
> Any suggestion about any other meshing software that could be used which
> would avoid this issue?
>
> Thanks
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