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  3. There are two types of residual options available in CFX: RMS and MAX. Which one should I use to set convergence criteria and why?

There are two types of residual options available in CFX: RMS and MAX. Which one should I use to set convergence criteria and why?

Tagged: 19.1, cfx, fluid-dynamics, General - CFX
    • April 5, 2023 at 2:32 pm
      FAQFAQ
      Participant

      For a well-posed problem, both the RMS and MAX norms behave identically and differ by an order of magnitude. However, in cases where there is strong swirl or separation-reattachment, the MAX norm will be far higher than RMS norm. Hence, it is acceptable to set RMS residual as the Convergence Criteria where the magnitude of limit [1.0E-4 or 1.0E-5 or 1.0E-6] may be selected based on problem specific experience.

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