I am working on Effect of wind pressure on electricity poles along the train track lines induced by the movement of high speed trains. I have created my train model and the electricity poles. I created the first boundary condition which contains only the train model and I also created the second boundary condition that contains both the first boundary condition and the electricity poles. I used this method because the train is in the dynamic region (sliding mesh) while the electricity poles are on the static region. I created two inlets and outlets with respect to the two boundary conditions am using.

My question: I didn't see mesh interface in my setup tree and how can i activate mesh interface? My meshing didn't fail.