Numerical Simulation of Polymer Flows in Coat-Hanger Die Using Wagner Constitutive Model
An understanding of flow behavior of polymer melts through a slit die is extremely important for optimizing die design. In this paper numerical simulations have been undertaken for the flow of linear low-density polyethylene through Coat-hanger sheet dies. A new finite element method is proposed to simulate the flow in slit channel using Wagner constitutive model. This is one kind of finite element semi-analytical method by which the velocity distributions in thickness direction is approach by Fourier series. Numerical results of volumetric flow and pressure in coat-hanger dies are given to compare to the three-dimensional simulation using the finite element method. It appears that numerical solutions are as accurate as the complete 3D calculations and the computing time can be saved.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Y. Li and J. R. Zheng, "Numerical Simulation of Polymer Flows in Coat-Hanger Die Using Wagner Constitutive Model", Advanced Materials Research, Vols. 189-193, pp. 1941-1945, 2011