I am using the GUI to copy the mesh pattern from one face to another to create identical meshes. However, it takes more time to create the boundary mesh on the surface, offset the shell pattern, and copy the mesh between the faces. Even after this effort, because of several circular features in my model, the part mesh is often not generated successfully. So, again, I need to refine the edges and do the same things. I need to do this procedure for my 20 models. If the opposite face meshes are not identical, then the periodic boundary condition is not working. Can you suggest some instructions to mesh this model properly to create identical meshes on opposite faces? I ended with the mesh generation failing while merging the adjacent meshes. 

Abaqus ​​​​​​​

Trying to create identical meshes on the opposite faces of the above part