Divergence on fan calculation
 

Good evening,


I am trying to carry out a calculation of a centrifugal fan but the calculation doesn't converge (graph in attachment) :


Do you have any idea of what could be the root cause ?


Thank you in advance.


Best regards,

Ok, I think I found the issue.
0 pressure at inlet seems to cause the problem. Solved if I put 0 at outlet and zero gradient at inlet.