[robboflea]

Dear all,

I'm new in using ICEM and Fluent. I'm presently meshing a 2D turbine blade (attached). I generated the mesh using basically the instructions of the tutorial for airfol meshing on youtube.

(http://www.youtube.com/watch?v=6wQPe...eature=related)

So basically I:

1)created the pre-mesh
2)converted it to unstructured mesh
3)selected Fluent as solver
4)specified boundary conditions
5)wrote input (Output -> write input)

While specifying the boundary conditions I assigned to the upper and lower boundaries of the domain (belonging to the same "PERIODIC" part) a periodicity boundary condition.

When I try to open the mesh in fluent i got the following error:

"Warning: Inappropriate zone type (periodic) for one-sided face zone 17.
Changing to wall.
Error: Internal error at line 2995 in file '..\..\src\f_periodic.c'.
thread_periodic_default: null neighbor cell thread(s)"

Am I missing something in the definition of the periodicity? For example I read that there's a function in Mesh->Global Mesh Setup->Set up periodicity. I didn't use that command since it was not used in the tutorial. Is it mandatory to use it always? How should I define the translational periodicity in this occasion?
Also I saw in some other ICEM tutorials that in some cases a periodicity between block vertices is created. What's its effect? When should it be needed?

I'm so sorry to ask you so many questions and I hope that somebody can help me. Unfortunately I didn't find ICEM help, or even google, helpful for solving my doubts.

Thanks in advance!

Rob