[anand32]

Dear All

I am currently learning CFD meshing primarily through ICEM and am now on tet meshes.

My question to you is regarding generating Delauney mesh.

We all know that Delauney mesh requires a surface mesh. Generally, we use Octree mesh first, delete the volume mesh and then create the Delauney mesh from the remaining (surface) elements- perhaps after smoothening.

However, we know that Octree mesh needs a closed geometry- no yellow curves.

So can we avoid Octree mesh altogether by creating a shell mesh first, and then launching Delauney? Will this strategy work in the case of yellow curves- where Octree will fail?

Thank you.

[diamondx]

Yellow curve means there is no cap. So mesh will propagate. Your intentions are not clear. Yes you can create shell and then delaunay, this approach does not always work, it depends on the complexity of the geometry and sizing ( uniform sizing). Can you share some picture to show us your intentions. You know you can create a solid body then delete the volume mesh. You will end up with surface mesh only...

[kad]

Originally Posted by anand32

So can we avoid Octree mesh altogether by creating a shell mesh first, and then launching Delauney? Will this strategy work in the case of yellow curves- where Octree will fail?

Thank you.

Like diamondx stated in general yes. Shell mesh can be created first. On the other hand this strategy is very unlikely to work as long as there yellow or single curves for patch dependent meshing. Topolgy and sizing is much more critical for patch dependent algorithm.

Another point: As we do not know your model single curves might also be legit in some rare cases. Imagine a 2D baffle surface e.g.