Is there an easier way for making 3D structured meshes with structures inside of it?
I'm meshing a fractured well. The entire domain is a rectangle, and inside of it, there is an S-shaped fracture (see figure below). I want to create a regular mesh with hexahedrons/tetrahedrons, but the method I've found involves creating numerous parallelepipeds/cubes and then generating structured meshes inside each one. Is this the only approach, or is there an easier method?
And here is the original mesh without the cubes/parallelepipeds:
Figures of the structured elements and non-structured elements:
Edited by Lamparejo