Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die

许星明; 赵国群; 秦升学; 王威

doi:10.1016/S1004-9541(09)60170-1

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Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die

Updated：2026-01-06

- Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die
- Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die
- 中国化学工程学报（英文版） 2011年19卷第1期页码：10-17
- Affiliations：
  
  1. College of Mechanical and Electrical Engineering, Shandong University of Science and Technology, Tai’an,China,271019
  2. Engineering Research Center for Mold&Die Technologies, Shandong University,Jinan,China,250061
  3. College of Mechanical and Electrical Engineering, Shandong University of Science and Technology,Qingdao,China,266510
- Author bio：
- Funds：
  
  Supported by the National Science Foundation for Distinguished Young Scholars of China(50425517);the Shandong Province Natural Science Foundation(Y2007F59)
- DOI：10.1016/S1004-9541(09)60170-1
  中图分类号：
- 纸质出版：2011
- Accepted：
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许星明, 赵国群, 秦升学, 等. Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die[J]. 中国化学工程学报（英文版）, 2011,19(1):10-17.

XU Xingming, ZHAO Guoqun, QIN Shengxue, WANG Wei. Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die[J]. , 2011, 19(1): 10-17.
许星明, 赵国群, 秦升学, 等. Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die[J]. 中国化学工程学报（英文版）, 2011,19(1):10-17. DOI： 10.1016/S1004-9541(09)60170-1.

XU Xingming, ZHAO Guoqun, QIN Shengxue, WANG Wei. Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die[J]. , 2011, 19(1): 10-17. DOI： 10.1016/S1004-9541(09)60170-1.

摘要

Abstract

The numerical simulation of extrudate swell is significant in extrusion processing.Precise prediction of extrudate swell is propitious to the control of melt flow and the quality of final products.A mathematical model of three-dimensional(3D)viscoelastic flow through elliptical ring die for polymer extrusion was investigated.The penalty function formulation of viscoelastic incompressible fluid was introduced to the finite element model to analyze 3D extrusion problem.The discrete elastic viscous split stress(DEVSS)and streamline-upwind PetrovGalerkin(SUPG)technology were used to obtain stable simulation results.Free surface was updated by updating the streamlines which needs less memory space.According to numerical simulation results

the effect of zero-shear viscosity and elongation parameter on extrudate swell was slight

but with the increase of volumetric flow rate and relax time the extrudate swell ratio increased markedly.Finally

the numerical simulation of extrudate swell flow for low-density polyethylene(LDPE)melts was investigated and the results agreed well with others’work.These conclusions provided quantitative basis for the forecasting extrudate swell ratio and the controlling of extrusion productivity shape.

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