paraboloid

Initial tetrahedral mesh has 3,138 vertices, all on the boundary surface.

Triangular surface mesh of the initial mesh.

There are 4,952 tetrahedral elements with minimum dihedral angle less than five degree.

After sink-insertion, 161 small slivers survived.

Sliver-exudation eliminates all slivers with min dih angle less than five degree.
Number of tetrahedra is decreased from 75,555 to 73,423.
Overall distribution of minimum dihedral angle is also improved.