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Issues Concerning the Rate of Heat Transfer from a Spinline

  • G. Vassilatos , E. R. Schmelzer and M. M. Denn
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 7 Issue 2

Abstract

Two-dimensional convective heat transfer in a non-isothermal spinline is analyzed. A rigorous derivation of the macroscopic, one-dimensional energy balance describing the cooling of a spinline leads to an equation that differs subtly from the commonly used one-dimensional equation; this difference has practical implications for the correct computation of convective heat transfer coefficients from experimental data obtained from spinlines exhibiting significant radial temperature gradients and, in turn, for the prediction of correct spinline temperature profiles. The errors involved are illustrated with computed results and a method is proposed for the determination of the correct heat transfer coefficients in the presence of radial temperature gradients. Further, it is shown that the radial convective heat flux resulting from the inward radial velocity of an attenuating spinline is important and its omission can lead to significant errors in the computed temperature.

* Mail address: Dr. G. Vassilatos, E.I. Du Pont de Nemours and Company, P.O. Box 80304, Exp. Station, Wilmington, DE 19880-0304, U.S.A.
Received: 1991-5-9
Accepted: 1991-10-10
Published Online: 2013-05-27
Published in Print: 1992-05-01

© 1992, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Continuous Mixing and Compounds
  4. Starve-fed Flow in Co-Rotating Twin Screw Extruders
  5. Process for Improvement in Toughness of Unsaturated Polyester with Elastomer
  6. Mechanical Properties of Thermoplastic Polyurethane Blends and Copolymers of Styrene and Acrylonitrile
  7. Extrusion
  8. Mixing on Melting in Single Screw Extrusion
  9. Numerical Study of Slip at the Walls in the Extruder
  10. Elimination of Sag in Plastic Pipe Extrusion
  11. Fibers and Film
  12. Issues Concerning the Rate of Heat Transfer from a Spinline
  13. Skew Stretched Polycarbonate Films
  14. Molding
  15. Molecular Orientation in Injection-Molded Polypropylene Copolymers with Ethylene
  16. Melt-recrystallization of Talc-filled Polypropylene Injection Moldings
  17. Processing Characteristics of Thermoplastic Sheet Composites
  18. Rapid Communication of Recent Advances
  19. The Face-relief Strategy for Design of Profile Dies
https://doi.org/10.3139/217.920144

Articles in the same Issue

  1. Contents
  2. Contents
  3. Continuous Mixing and Compounds
  4. Starve-fed Flow in Co-Rotating Twin Screw Extruders
  5. Process for Improvement in Toughness of Unsaturated Polyester with Elastomer
  6. Mechanical Properties of Thermoplastic Polyurethane Blends and Copolymers of Styrene and Acrylonitrile
  7. Extrusion
  8. Mixing on Melting in Single Screw Extrusion
  9. Numerical Study of Slip at the Walls in the Extruder
  10. Elimination of Sag in Plastic Pipe Extrusion
  11. Fibers and Film
  12. Issues Concerning the Rate of Heat Transfer from a Spinline
  13. Skew Stretched Polycarbonate Films
  14. Molding
  15. Molecular Orientation in Injection-Molded Polypropylene Copolymers with Ethylene
  16. Melt-recrystallization of Talc-filled Polypropylene Injection Moldings
  17. Processing Characteristics of Thermoplastic Sheet Composites
  18. Rapid Communication of Recent Advances
  19. The Face-relief Strategy for Design of Profile Dies
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