How to use a surface object to create a group selection?

Hi All,

I have STL Surface Mesh object that I want to use to create a group selection below this surface?

Is there anyone know how to do it?

I can convert this STL file to a DXF or SHP files if needed.

Thanks a lot!

Best,
James

Hi,

In my experience, there's nothing wrong or difficult to work with only .stl files in FEFLOW. In fact, in my thesis I only used this kind of file.

Having said that, I suppose that you have a 'clean' non-manifold surface. Try to close it somehow, and assign region-markers to each enclosed zone. If you're using the tet-gen algorithm, it will generate different groups according to region-markers.

Hi DrGuti,

Thank you so much for your answer.

Do you mind to let me know what software do you use to create the STL surface and tet-gen algorithm?

Best,
James

Sure, I use Rhinoceros 3D as cad solution and pre-process everything related to geometry.

The tetgen algorithm is a built-in option within FEFLOW.

If you have more specific questions don't hesitate to write me.

Hi DrGuti,

Thanks a lot for your reply!

Yes, I will explore the Rhino and ask you if I have more specific questions.

Really appreciate you help!

Best,
James