[diamondx]

My method to the conformal mesh:

1- generate the volume mesh for the inner domain (T-grid or ICEM), whatever is fine for you.
2- save the mesh file, as "inner-domain"
3- delete the volume mesh of the inner-domain, and the shell in the ground, leave only the shell element in the interface.
4- from those shell elements in the interface, you will generate a volume mesh for the outer domain (t-grid or icem), i would have done it in tgrid, then i will save the mesh file for the outer domain. Now we have two msh files, but the advantage is that the nodes in the interface are in the exact same position. which makes it easy to merge !!!

Yet i have to try all this, but i'm sure it will work, i did some test with some simple cubes recently at work