[naveen k s]

Dear Foamers,
I'm trying to simulate flow over the bluff body case. For this purpose, I've created a mesh using ICEM CFD software. I have split up the mesh into two blocks and saved it as two different projects.
1. Block 1 (projects): It has finer mesh generated around the geometry and in the wake region.
2. Block 2 (project 2): It has a coarser mesh, and it resides around the Block 1 mesh.

The pictures of these two projects are attached.

Then in a separate new project, I performed these steps to merge them:
1. Imported the geometry of project 2 and project 1, and then chose the merge option to combine them.
2. Imported the mesh of project 2 and project 1, and then chose the merge option to combine the two meshes, so as to obtain a complete mesh (picture is attached).

Now, my question is what should we do with the INTERFACE that is created between the two blocks. Please note that I will be importing this mesh to OpenFOAM.
a. Is there any way I can remove this INTERFACE and get an errorless mesh.
OR
b. Whether there exists any B.C. that can be used at the INTERFACE.