Abstract
Plastics is one of the most important materials. The flow state and temperature of polymer melts are important on polymer processing. Polymer melts have elasticity as well as viscosity. In addition to this, its zero-shear viscosity and relaxation time depend on temperature. In this study, we investigate effects of Nusselt number by using the streamline-upwinding finite element method. The non-isothermal Phan-Thien, Tanner model proposed by Sugeng and Phan-Thien was used as the constitutive equation. When the Nusselt number increases, the temperature of extrudates decrease and the maximum swelling ratio increases.
