When you are planning to use Ansys Polymat to determine the appropriate material parameters for your model, you should first give consideration to the following issues:
Definition of the modeling goals: What specific results are required from the model and how will they be used? What degree of accuracy is required from the model?
Choice of models: Is the flow isothermal or non-isothermal? If it is non-isothermal, can you simplify the problem to examine the isothermal material behavior first?
Careful consideration of these issues before beginning your Ansys Polymat analysis will contribute significantly to the success of your modeling effort. When you are planning a CFD project, take advantage of the customer support provided to all Ansys Polymat users.