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CFD Analysis of the Frame Invariance of the Melt Temperature Rise in a Single-screw Extruder

  • F. Habla , S. Obermeier , L. Dietsche , O. Kintzel and O. Hinrichsen
Published/Copyright: November 7, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 28 Issue 5

Abstract

In analytical analyses for single-screw extruders the simplified approach of rotating the barrel and keeping the screw fixed is often used instead of rotating the screw and fixing the barrel. Although the flow field is independent of the reference frame, as has already been shown to a satisfactory degree (Rauwendaal et al., 1997), the question of the dependence of the melt temperature rise on the reference frame is still being challenged, e.g. Campbell et al. (2001, 2008). In this work we develop a finite-volume CFD code allowing for the three-dimensional simulation of the flow and temperature rise in both reference frames. The question of frame invariance is addressed by simulating the flow of a Newtonian-like polycarbonate both in a two-dimensional cross-section of a single-screw extruder and in a three-dimensional model with two full turns of the screw. Our results show that the kinematics and the melt temperature rise are equal for screw- and barrel-rotation and thus independent of the reference frame. Furthermore, the presence of a clearance flow has a negligible influence on the temperature rise.

∗ Mail address: Olaf Hinrichsen, Technische Universität München, Catalysis Research Center and Chemistry Department, Lichtenbergstraße 4, D-85748 Garching b. München, Germany, E-mail address:

References

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Received: 2012-12-15
Accepted: 2013-7-8
Published Online: 2013-11-07
Published in Print: 2013-11-01

© 2013, Carl Hanser Verlag, Munich

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https://doi.org/10.3139/217.2753

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Use of the Taguchi Method for Optimization of Poly (Butylene Terephthalate) and Poly (Trimethylene Terephthalate) Blends through Injection Molding
  5. CFD Analysis of the Frame Invariance of the Melt Temperature Rise in a Single-screw Extruder
  6. Simulation Study of Thermotropic LCPs and Prediction of Normal Stress Difference at High Shear Rate
  7. Study on Mechanical, Thermal Properties and Morphology of Biodegradable Poly(butylene succinate)/Nano-TiO2 Composites
  8. Preparation and Characterization of Bamboo Fibers Coated with Titanium Urushiol and its Composite Materials with Polypropylene
  9. Effect of the Mandrel Rotation Speed and Inner Wall Cooling Rate on the Performance and Structure of Polypropylene Block-Copolymer Pipe
  10. Modification of Liquid Oxygen Compatibility of Bisphenol F Epoxy Resin
  11. Pressure Variation during Interfacial Instability in the Coextrusion of Low Density Polyethylene Melts
  12. The Effects of Processing Parameters on the Residual Wall Thickness Distribution at the Sharp Angle Corner of Water Assisted Injection Molded Parts
  13. The Influence of Extrusion Conditions on Mechanical and Thermal Properties of Virgin and Recycled PP, HIPS, ABS and Their Ternary Blends
  14. Influence of Mold Temperature on Mold Filling Behavior and Part Properties in Micro Injection Molding
  15. On the Pressure Dependency of the Bagley Correction
  16. PPS News
  17. PPS News
  18. Seikei Kakou Abstracts
  19. Seikei-Kakou Abstracts
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