Regarding AMG error

- October 25, 2018 at 6:56 am
  
  Adidash97
  Subscriber
  
  I am doing CFD analysis of centrifugal pump using MRF model. While running the calculation, it is showing "Divergence in AMG solver:k increasing relaxation sweeps." What does it mean?
- October 25, 2018 at 7:01 am
  
  Keyur Kanade
  Ansys Employee
  
  Hello,
  
  Can you please give more details about your settings. Can you please insert images of your mesh.
  
  Also please take a look at following for reference.
  
  Regards,
  
  Keyur
- October 29, 2018 at 10:05 am
  
  seeta gunti
  Ansys Employee
  
  Hi,
  
  Error tells you that the solver facing issues in solving "k" equation and finally get diverged. You can run with first order discretization schemes for turbulence equations and reduce the Under relaxation Factors. ( by default they set to 0.7, you can reduce to 0.5 and check). If still getting diverged, you can still reduce to 0.4 and run. Check the mesh as well.
  
  Regards,
  
  Seeta

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