interior walls meshing
 

hi
I'm a new user of Ansys fluent, and I have a problem with meshing the interior surface bodies that I have built inside my solid body model. The program seems not to recognize it as a wall, and therefore, it won't consider these walls in the solution tab, so my results are not correct. Please help me figure it out cause I have searched the manual and many forums and still didn't find a thing. plus I use ansysfluent 19
I have attached these picture from my model.
thank you