Fluids

Fluids

Help needed! Expression error for Thermal Conductivity Air

    • Randy92
      Subscriber

      Hello, I am trying to write an expression to get realistic values for Thermal Conductivity for air. I´m working with high temperatures so it is essential to include these values to get a realistic simulation.

    • Rob
      Ansys Employee
      And people ask why I still use UDFs for some problems.....
      The exponent needs to be unitless so use ( T [K] / 1 [K] ) in the expression. To get the overall units put the whole lot into ( ) and stick the units at teh end *1 [kg m s^-3 K] or whatever you want for the conductivity.
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