To specify the type of flow you are modeling, choose the Select Fluid Model menu item in the top-level Ansys Polymat menu.

  Select Fluid Model

In the resulting menu, you can choose isothermal or non-isothermal generalized Newtonian, differential viscoelastic, or integral viscoelastic flow. Select Upper level menu when you are done.

If you plan to perform fitting for the temperature dependence of the viscosity in a non-isothermal flow, note that you will need to supply several experimental data curves at different temperatures.