Numerical simulation of multi-layer flow for polymer melts - A study of the effect of viscoelasticity on interface shape of polymers within dies

K. Matsunaga, Toshihisa Kajiwara, K. Funatsu

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A two-dimensional simulation was developed for multi-layer confluent viscoelastic flow in dies, using a finite element method. The simulated interface shape was compared with the experimental results of previous researchers, and the simulated results were confirmed. Two-layer and three-layer flows of two or three kinds of viscoelastic fluids were simulated. Fluids with different non-Newtonian viscosities and the first normal stress differences were used. The layer thicknesses in dies are mainly determined by the shear viscosity and less by the elasticity of the fluid. The normal stress difference between the fluids forming an interface may be related to interfacial instability, and normal stresses near the interface were examined. The normal stress difference between both fluids was affected by the first normal stress difference and elongational viscosity.

Original languageEnglish
Pages (from-to)1099-1111
Number of pages13
JournalPolymer Engineering and Science
Volume38
Issue number7
DOIs
Publication statusPublished - Jan 1 1998
Externally publishedYes

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Polymer melts
Viscoelasticity
Polymers
Fluids
Computer simulation
Viscosity
Shear viscosity
Interfaces (computer)
Elasticity
Finite element method

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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