Reason behind setting DIFFERENT default convergence criteria for continutiy and Energy equations?

    • vidyadhar.kpm


      May I request you to let me know the answer for the following:

      In pressure based solver of Fluent, Why the default values of convergence criteria are set different for continuity, momentum (1e-03 each) and energy (1e-06) equations?

      Thanks & Regards,



    • DrAmine
      Ansys Employee
      As the diffusion process of heat requires quite more iterations to really converge. That is why it is recommended not to alter the under relaxation factor of the energy equation
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