[mohamed samy]

I have 2d domain as shown in attachment consist of stationery domain (rectangle with circular hole in its center) and rotating domain (circle with rotating solid square)
and i did mesh for this domain on icem as they are one zone(made one block sliced it into blocks and then determined number of division) but my question is how to make interface between two zones ?

in ansys mesh i can name the two interface edges (one related to stationery and other for rotating) by different names and in fluent i can make interface between them but in icem i can't give interface two different names so that i cant make the interface boundary conditions between them

can any one help ?