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Reacting Flows

Reacting Flows

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  3. How to calculate second derivative of a flow variable in a UDF?

How to calculate second derivative of a flow variable in a UDF?

Tagged: 17.2, fluent, fluid-dynamics, Scripting/Journaling/UDF, Species/Reactions
    • June 5, 2023 at 7:06 am
      FAQFAQ
      Participant

      Second derivatives are not stored, but a gradient of a variable, e. g. C_T_G can be stored in a user-defined scalar C_USDI, and then gradient of C_USDI can be calculated by C_USDI_G, thus giving the second derivative data Temp memory must be allocated before manipulating gradient macros, as usual.

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