[Gmsh] Mesh volumes partially in contact

[Harry Bosch]

I am using Gmsh GUI.And I have a problem when meshing volumes that are in contact (being the contact surface of one greater than that of the other). The problem is that in this way the meshes of both volumes do not share all the nodes on the contact surface.
I believe that this could be done with the cut and merge faces option, which no longer exists in the latest versions.
I have read that now it must be addressed through Boolean operations. But, on the one hand, I do not want to unite the volumes, since they are going to be of different materials. And on the other hand I do not understand how these operations can be done in the GUI environment.
May you suggest me how to approach this problem? Is there an example similar to what I mention?
Thanks in advance for your comments.
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