Netgen Periodic Meshing?

It appears that Periodic Meshing is supported in Netgen - ngsolve.org/docu/latest/how_to/periodic.html

But how do I create a periodic mesh of a 3D cubic geometry in Netgen? I am only using Netgen for meshing to export to other FEA software.

Did you have a look at the 3D example in the documentation?
Which mesh format do you use to export it, not all of them support periodic meshes. In addition, your FEA software has to support periodicity.

Hi matthiash,

You mean this tutorial? - ngsolve.org/docu/nightly/i-tutorials/unit-4.2-csg/csg.html

I am using ABAQUS for FEA and it supports Periodic Boundary Condition, so exporting in ABAQUS input file format is fine for me.

I should mention that the 3D cubic geometry I have is in STL format and it has randomly distributed voids (empty spaces) inside. Will Netgen be able to mesh it periodically?

As far as I know Netgen only supports periodicity for CSG geometries yet... Are the voids in the domain or at the boundary?
If they are in the domain you could mesh the voids from the stl geometry and the periodic cube seperately and merge the meshes afterwards.
A tutorial on how to merge meshes is here
ngsolve.org/docu/latest/netgen_tutorials...ing_with_meshes.html
Best
Christopher