I am trying to mesh a tank with a baffle inside (Simulating a 60 degree sector of tank with periodic BC).

Tried meshing and did named selection of interior baffle (Thin) from Ansys meshing module but the baffle was not showing in fluent. I solved this by naming the baffle from DM itself and baffle and tank was made in to single part, this worked and baffle showed in fluent anlong with a new boundary 'baffle-shadow'.

How to handle 'Baffle-shadow'? keep it with default conditions or give same conditions as orginal baffle?