[Sama Mohammad]

Hello,
I want to model two open channels using ANSYS fluent and compare between each of them.
The first model is with pier in the middle and the other one is similar to it except the Pier.
I want the same mesh in both scenarios except for the region of the pier itself as It doesn't exist in the first model, In other meaning, I want the same vertices for the area around the pier in order to be able to compare results of both scenarios.
But I can't find a way for sharing a part of the mesh - not the whole mesh - for different geometry models!

I'd be very grateful for anyone who could help me find a way for that.
Thank you