How to mesh when there are many interior faces?

[shineusn]

Coreform Cubit Version: 2023.4
Platform: Windows 11

Issue
Dear all ,
When I generate the mesh with the following command, it always shows the following error, how can I change it, thank you very much!

cubit01.cub (61.1 KB)

Command:
surface 61 to 67 scheme trimesh
surf 61 to 67 size 1000
mesh surf 61 to 67
vol 19 scheme tetmesh
vol 19 tetmesh respect tri in surf 61 to 61
mesh vol 19

ERROR: Inconsistent edge to triangle count relationship in bounding mesh.
ERROR: Mesh of Volume 19 is invalid.

[karl]

Hi,

I am going to have to take some time to look at this. What you did should work. In fact, I think just doing

surf 61 to 67 size 1000
vol 19 scheme tetemesh
mesh vol 19

should work. If I add set keep invalid mesh on and examine the resulting mesh, it seems to show that the curves in the fault planes are correctly connected to the surrounding tetrahedra. The error may be a false positive.

If you have time, you could try setting the “keep invalid mesh on” and check it in your analysis code.

Otherwise, the work around is to separate out the fault planes into an independent sheet body and then add the triangles with tetmesh respect.

reset
open "~/Downloads/cubit01.cub"
separate surface 66 64 61 62 63 65 67  

surf in body 20 size 1000
surf in body 20 scheme trimesh

mesh surf in body 20
vol 19 tetmesh respect tri in surf in body 20
vol 19 scheme tetmesh
mesh vol 19

Thanks,
Karl