Select the fluid model that matches your experimental data best, and fix values for any of the associated material parameters that you want to remain constant during the fitting calculation. See Selecting the Type of Fluid Model and Fixing Values for Selected Material Parameters for details.

Read the experimental data curve(s) into Ansys Polymat. See Reading Experimental Data Curves for the Automatic Fitting Method for information about reading a data curve. (If you need to define a data curve, you can do so by following the steps described in Working with Curves. Then save the curve, as described in Saving Experimental Data.)

Define the numerical parameters for the curve calculation. See Defining Numerical Parameters for details.

Draw the experimental curve(s). See Drawing the Experimental Curves for details.

Specify a name for the material data file that Ansys Polymat creates after it determines the best material parameter values to fit your experimental data. See Specifying a Name for the Material Data File for details.

Run the automatic fitting, as described in Performing the Automatic Fitting Analysis.