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  3. Can NASA9 piecewise polynomial functions be implemented into thermo database files for Fluent?

Can NASA9 piecewise polynomial functions be implemented into thermo database files for Fluent?

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    • October 21, 2021 at 11:04 pm
      Calvin
      Subscriber

      The Chemkin-Pro 2021 R1 Input Manual outlines how to input thermodynamic data in both 7-coefficent polynomial format and 9-Coefficient Format (NASA9).

      I would like to alter a thermo.db file to include ``THERMO NASA9`` type data in this format. Will Fluent read and accept this, or only 7-coefficient?

      Thanks for your help ?

    • October 22, 2021 at 12:56 pm
      Rob
      Forum Moderator
      Looks like Fluent caps at 8 coefficients for material properties. A UDF will allow you to use all 9, but I'd want to see graphs proving you needed more than about 5 terms!
    • October 26, 2021 at 6:02 am
      Calvin
      Subscriber
      Ok thanks !
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