Karthik R

You should be able to find the walls you would like to connect. The first step would be to fuse the walls to form an interior zone. Please use the TUI command


This will create an interior zone. Then you right-click on this interior zone and change this to the wall. This will create a coupled wall - wall-shadow. This way, you should be able to connect your steel and sand boundaries to get your CHT problem set-up correctly.

I hope this helps.