To use Ansys Polymat to fit material parameters to your data, you will follow the basic procedural steps below:
Start Ansys Polymat.
Decide if you want to use an automatic or non-automatic procedure.
Follow the appropriate procedure, as described below.
For the non-automatic procedure:
Read or define the experimental data curve.
Specify which curves you want to calculate (shear viscosity, shear stress, and so on).
Define the numerical parameters for the curve calculation.
Select the fluid model that matches your experimental data best, and define initial values for the associated material parameters.
Vary the value of one material parameter at a time and draw the resulting data curve, until you find the combination that results in a curve most similar to your experimental curve.
When you are satisfied with the curve fitting, save the material parameters to a material data file, which you can read into Ansys Polydata during your problem definition.
For the automatic procedure:
Select the fluid model that matches your experimental data best, and specify whether or not you want to fix any of the associated material parameters to a constant value.
Specify the experimental data curves: type of data, temperature (if needed), and filename.
Draw the experimental curves.
Specify the name of the material data file to which Ansys Polymat should save the material parameters when the fitting is complete.
Define the numerical parameters for the curve fitting.
Have Ansys Polymat perform the fitting calculation by varying each of the non-fixed material parameters until the best combination is determined. By default, the computed curves are displayed on the same plot as the experimental data curves to allow for comparison.