Fluids

Fluids

Regarding AMG error

    • 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?

    • 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

    • 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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