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Thermo-viscous Effects in Extrusion of Planar Jets with Solidification

  • A. N. Alexandrou and G. Torikoglu
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 7 Issue 1

Abstract

The present work is a study of the thermo-viscous effects in the extrusion of a “power law” liquid with temperature dependent viscosity by including the effects of solidification. This is achieved by using a novel inverse isotherm finite element method. The method is based on an inversely defined (but not inverted) formulation where the isotherms are characteristic transverse coordinate lines. The method allows the simultaneous evaluation of all the field variables as well as the apriori unknown geometric parameters. It is shown that under certain conditions the extrudate can be significantly affected by the presence of the solidification front. Results are presented for die-swell, pressure, and location of solidification as a function of the material properties.

* Mail address: Dr. A. Alexandrou, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, U.S.A.
Received: 1990-10-7
Accepted: 1991-4-18
Published Online: 2013-05-27
Published in Print: 1992-03-01

© 1992, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal and Continuous Mixers
  4. Model Development for an Internal Mixer
  5. Simulation of Flow in a Farrel Continuous Mixer
  6. Extrusion
  7. Influence of Process Data on the Throughput of Large Extruders within the Range of 600 to 6 000 kg/h
  8. Conveying and Melting in Screw Extruders with Axial Screw Movement
  9. Thermo-viscous Effects in Extrusion of Planar Jets with Solidification
  10. Film
  11. Dynamics and Stability of Double Bubble Tubular Film Extrusion
  12. Melt Strength Behavior of Polyethylene Blends**
  13. Optical Properties and Orientation Development in Uniaxially Stretched Syndiotactic Polystyrene from Amorphous Precursors
  14. Molding
  15. Thermoviscoelastic Calculation of Residual Stresses and Residual Shapes of Injection Molded Parts**
  16. Analysis and Simulation of Structural Reaction Injection Molding (SRIM)
  17. Crystal Orientation in Injection Moldings of Flaky Filler-Filled Polypropylenes
  18. Erratum
  19. Molecular Orientation in Injection-molded Polypropylene Copolymers with Ethylene
https://doi.org/10.3139/217.920032

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal and Continuous Mixers
  4. Model Development for an Internal Mixer
  5. Simulation of Flow in a Farrel Continuous Mixer
  6. Extrusion
  7. Influence of Process Data on the Throughput of Large Extruders within the Range of 600 to 6 000 kg/h
  8. Conveying and Melting in Screw Extruders with Axial Screw Movement
  9. Thermo-viscous Effects in Extrusion of Planar Jets with Solidification
  10. Film
  11. Dynamics and Stability of Double Bubble Tubular Film Extrusion
  12. Melt Strength Behavior of Polyethylene Blends**
  13. Optical Properties and Orientation Development in Uniaxially Stretched Syndiotactic Polystyrene from Amorphous Precursors
  14. Molding
  15. Thermoviscoelastic Calculation of Residual Stresses and Residual Shapes of Injection Molded Parts**
  16. Analysis and Simulation of Structural Reaction Injection Molding (SRIM)
  17. Crystal Orientation in Injection Moldings of Flaky Filler-Filled Polypropylenes
  18. Erratum
  19. Molecular Orientation in Injection-molded Polypropylene Copolymers with Ethylene
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