Ansys Polyflow allows you to include the transfer of heat via conduction and convection within the fluid and/or solid regions in your model. In die design, for example, rheological and thermophysical properties of the melt and the thermal settings in the die can be important in obtaining a geometrically well-defined polymer product. The heat transfer calculation ensures that temperature-dependent material properties are accurately resolved; this is especially important when the shape and surface quality of the product are of critical importance. The temperature field at the die exit can also influence the swelling and drawing behavior of the product.