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A 3D Numerical Study of Fluid Flow and Heat Transfer in a Single Screw Extruder

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Published/Copyright: June 5, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 17 Issue 2

Abstract

A numerical study of three-dimensional fluid flow and heat transfer in the metering section of a single screw extruder has been performed. The screw channel was simplified by unwinding the channel and the coordinate system was fixed on the screw root in the present model. The pressure distribution over the inlet region was to be extrapolated from the solution of interior pressure. The prescribed mass flow rate was imposed on the outlet of the unwinding screw channel. The three-dimensional velocity fields, temperature, viscosity, and pressure profiles in the screw channel were calculated by using the commercial code, STAR-CD, based on the finite volume method.

Some of the results of the present full 3D model were compared with the results from the marching-type 3D model. It is shown that the present work can capture the back flow by the pressure gradient near the screw root in the cases of small mass flow rates. There exist significant discrepancies in temperature between the marching-type 3D model and the present 3D model. The present work well describes the effects of heating-up through the circulation flow and viscous dissipation. The cross-section contours of velocities, temperature, viscosities and pressures along the down-channel direction are also shown in this study.

* Mail address: W.-S. Kim, Department of Mechanical Engineering, Hanyang University, 1271 Sa 1-dong Ansan, Kyonggi-do, 425-791, South Korea
Received: 2002-11-20
Accepted: 2002-3-19
Published Online: 2013-06-05
Published in Print: 2002-05-01

© 2002, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Editorial
  2. Thirteenth of a Series: The First and Best Industrial Polymer Rheologist — Melvin Mooney (1893–1968)
  3. Single Extrusion
  4. A New Method for Simulating the Conveying of Solid Pellets
  5. A 3D Numerical Study of Fluid Flow and Heat Transfer in a Single Screw Extruder
  6. Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage
  7. Computational Study of the Velocity Field in the Conveying Element of a Ko-kneader with CFD Method
  8. Reactive Extrusion
  9. Modification of Polyolefin with Maleic Anhydride/Styrene and Methyl Methacrylate/Styrene
  10. Fibers and Films
  11. Direct Measurement of Fiber Temperature in the Continuous Drawing Process of PET Fiber Heated by CO2 Laser Radiation
  12. Injection Molding
  13. Evaluation of a Model Describing the Advancing Flow Front in Injection Moulding
  14. Process Design for Reducing the Warpage in Thin-walled Injection Molding
  15. Composites
  16. Preferable Filament Diameter Ratios of Hybrid Yarn Components for Optimized Longfiber Reinforced Thermoplastics
  17. Squeeze Flow Rheology of Glass Mat Thermoplastic (GMT) in Large Tools and at High Closing Velocities
  18. Analysis of Heat Flu from Molten Polymers to Molds in Injection Molding Processes
https://doi.org/10.3139/217.1686

Articles in the same Issue

  1. Editorial
  2. Thirteenth of a Series: The First and Best Industrial Polymer Rheologist — Melvin Mooney (1893–1968)
  3. Single Extrusion
  4. A New Method for Simulating the Conveying of Solid Pellets
  5. A 3D Numerical Study of Fluid Flow and Heat Transfer in a Single Screw Extruder
  6. Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage
  7. Computational Study of the Velocity Field in the Conveying Element of a Ko-kneader with CFD Method
  8. Reactive Extrusion
  9. Modification of Polyolefin with Maleic Anhydride/Styrene and Methyl Methacrylate/Styrene
  10. Fibers and Films
  11. Direct Measurement of Fiber Temperature in the Continuous Drawing Process of PET Fiber Heated by CO2 Laser Radiation
  12. Injection Molding
  13. Evaluation of a Model Describing the Advancing Flow Front in Injection Moulding
  14. Process Design for Reducing the Warpage in Thin-walled Injection Molding
  15. Composites
  16. Preferable Filament Diameter Ratios of Hybrid Yarn Components for Optimized Longfiber Reinforced Thermoplastics
  17. Squeeze Flow Rheology of Glass Mat Thermoplastic (GMT) in Large Tools and at High Closing Velocities
  18. Analysis of Heat Flu from Molten Polymers to Molds in Injection Molding Processes
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