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power law model for viscosity (carreau yasuda)

    • FERO86

      I am trying to simulate a non newtonian fluid using power law model for viscosity (temperature dependent) as shown below


      But, when i tried to use above variables in fluent, there was no option for expression. as shown below.

      As you can see the dialog box have no option for temperature dependent expression lambda, alpha, n etc.

      Then how can use the parameters lambda, alpha etc which are temperature dependent in form of expression.

      Please help me in this regard.


    • Rob
      Ansys Employee

      Have a look at Expressions or UDFs. If you search for the viscosity model on here you may find some hints. 

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