Avoiding divergence in a transient run Fluent

- March 16, 2022 at 12:35 pm
  
  desouzadacosta
  Subscriber
  
  Hi All,
  I am having divergence issue after 0.3 s (around 30000 iterations) for a transient run in Fluent:
- March 16, 2022 at 1:54 pm
  
  Rob
  Ansys Employee
  
  That's been struggling for the last several time steps. Assuming you have the data file saved have a look at what's going on. I suspect something is changing more quickly than the time step can resolve, so it's probable that you'll want to reduce the time step. For P-V coupling you may find PISO to be more efficient, the PBCS doesn't give much (if any) benefit on a transient run.

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