[Josh]

Hi all -

I'm encountering a strange problem when I try to create periodic sides on a 3D airfoil.

I have a working, complete 2D mesh that ran successfully (shown below).



I want to create a 3D mesh with periodic sides. The span length is 100.85531 mm. First, I went into the Global Mesh Setup and defined a translational periodicity with the z (span) offset as 100.85531. I then extruded my 2D blocking scheme to 3D using a z translation of 100.85531.



So far, so good. The problem arises when I begin specifying my periodic vertices. The vertices in the outer boundaries (inlet, farfield, outlet) don't seem to cause problems. The inner vertices (around the airfoil), however, seem to cause the mesh to extrude itself in the opposite direction desired (see below). The first picture shows the proper extrusion.



The next pictures show the problem areas.













Is my strategy incorrect? Any suggestions?

Thanks!

Josh