Learning Forum

[michal.czerwinski]

Hello, I have problems with setting up periodic in my combustion chamber.

Geometry is a 60 degree piece of CC. I created geometry in spaceclaim both periodic surfaces have the same dimensions.

I tried to set up periodic as rotational and with given offset 60 degress

Firstly, I try to set periodic in fluent meshing, but I got error : 

also tried asymmetric mesh boundaries - didn't work either

Then, I tried using fluent solver, but I got another error :

 

My conclusion is that for some reason fluent doesn't recognieze relation beetwen surfaces. Do you have any ideas what I could set up wrong or which parameters should I check?

 

Thanks for your answer

Kind Regards 

Michał

[Rob]

That should be OK. I assume the axis is set correctly? Also try -60 degrees as the order can matter in some cases. 

[michal.czerwinski]

 

Thanks for your reply, unfortunettly it didn’t help either. I may found the true problem though.

Fluent can see that there are 2 periodic surfaces, when I measured geom in Spaceclaim we can see that the angle beetwen them is 60 deg. However when I tried to use auto offset mode, it showed warning. That suggest that the angle is diffrent. So now I wonder at what point could it happened? During meshing or during saving Spaceclaim file or somewhere else?

 

[Rob]

That's not ideal. The angle should be preserved. How did you mesh the model?