[Aoki]

Hi all. I'm modelling a tidal stream turbine. To reduce the size I only built 1/3 of the turbine with periodic boundaries. I defined periodicity in global mesh parameters and generated the mesh. But when I read it in FLUENT it can only recognise one of the periodic boundaries.

I've read a few threads regarding to periodic boundaries, and it seems that to define a periodic boundary I would need to define the periodic vertices from the corresponding block after I define periodicity in global mesh parameters. Is that the reason why my mesh doesn't work properly? However, I'm currently doing an unstructured mesh and it doesn't have any blocking. Does it mean that I cannot define periodic boundaries on an unstructured mesh? Are there other ways to work round it?

Thanks in advance.