Meshing periodic segment airfoil
 

Dear all,

I am trying to model three airfoils rotating. Similar threads have been posted. There also exists the great youtube tutorial. During that tutorial a mesh is shown that I'd like to create but due to my lack of experience I need some help. I added a picture of the mesh I'd like to have. How can I tell ICEM not to lead all edges to the center but to get parallel edges to the periodic boundary? Is there any tutorial on that?

Any help is highly appreciated.

Kind regards

Philipp