Numerical Simulation of Polymer Flows in Coat-Hanger Die Using Wagner Constitutive Model

Abstract:

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.

• Periodical: Advanced Materials Research (Volumes 189-193)
• Pages: 1941-1945
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.189-193.1941
• Online since: February 2011
• Authors: Yong Li, Jian Rong Zheng
• Keywords: Coat-Hanger Die, Numerical Simulation, Plastic Manufacture, Polymer Melt, Viscoelastic Fluid

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