Learning Forum

[Govindan Nagappan]

See if you can use Layered tetrahedron or patch independent tetra. 

For PI tetra, make sure you use appropriate sizes. See how the octree method works: Patch Independent Algorithm for Tetrahedrons Method Control (ansys.com)

You need to pick an appropriate mesh size for the method. Slice and mesh a small region of the geometry and then once you know the appropriate size that works, use that on the full model and see if it helps.