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Computational Study of Velocity Field in the KE Element of a Modular Ko-Kneader with CFD Method

  • M. Mehranpour , H. Nazokdast and B. Dabir
Published/Copyright: June 3, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 18 Issue 4

Abstract

Attempts were made to predict the velocity field and shear rate distribution of a Newtonian type fluid in the KE element of the Buss Ko-Kneader by means of CFD method. The role of both rotating and reciprocating motion have been considered in three dimensional flow field. The computed results showed appreciable changes in the velocity counters during a period of reciprocating motion, and these changes were greater for the transverse flow compared to the down channel flow.

The predicted results also showed pronounced variations in the velocity profile of the transverse flow regarding both with direction and extent of drag and pressure flow as a result of reciprocating action, while the down channel velocity profile was found to be almost unaffected.

The extent of shear rate and hence shear rate distribution were found to be dominantly control by the down channel flow while transverse flow has a greater influence in determining the residence time distribution.

* Mail address: H. Nazokdast, Dept. of Polym. Eng., Amir kabir University of Technology, P. O. Box 15875-4413, Teheran, Iran
Received: 2003-5-13
Accepted: 2003-5-26
Published Online: 2013-06-03
Published in Print: 2003-12-01

© 2003, Carl Hanser Verlag, Munich

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  1. Contents
  2. Contents
  3. Editorial
  4. Fourth of a Series: Pioneering Polymer Industry Developments: The First Continuous Kneading Machines
  5. Screw Extrusion
  6. Prediction of Residence Time Distribution in EZ and KE Element of a Ko-Kneader by using CFD Method
  7. Computational Study of Velocity Field in the KE Element of a Modular Ko-Kneader with CFD Method
  8. Optimization of Sweet Bread Dough Processing Conditions by Twin Screw Extrusion
  9. Experimental Development of Processing Technology for Yuba-like Films Using Twin Screw Extrusion
  10. Die Extrusion
  11. Flow Analyses in a Spiral Mandrel Die Assuming Wall Slip
  12. Effect of Elongational Viscosity on the Flow in a Flat Die
  13. Measuring Polymer Melt Density and Viscosity in Real-time during Extrusion Processes using Ultrasound Sensors Fusion
  14. Film
  15. Scale-up Rule for Double Bubble Tubular Process of PA6 Film
  16. Molding
  17. Analysis of the Morphological Development of PBT/ABS Blends during the Twin Screw Extrusion and Injection Molding Processes
  18. Investigation of the Mechanical Properties and Chemical Resistance of PC/PBT/Impact Modifier Blends
  19. Structure Development in Injection Molding of Isotactic Polypropylene, its Blends, Compounds and Dynamic Vulcanizates
  20. The Flow Behavior of Core Material and Breakthrough Phenomenon in Sandwich Injection Molding
  21. The Flow Behavior of Core Material and Breakthrough Phenomenon in Sandwich Injection Molding
  22. PPS News
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https://doi.org/10.3139/217.1751

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Fourth of a Series: Pioneering Polymer Industry Developments: The First Continuous Kneading Machines
  5. Screw Extrusion
  6. Prediction of Residence Time Distribution in EZ and KE Element of a Ko-Kneader by using CFD Method
  7. Computational Study of Velocity Field in the KE Element of a Modular Ko-Kneader with CFD Method
  8. Optimization of Sweet Bread Dough Processing Conditions by Twin Screw Extrusion
  9. Experimental Development of Processing Technology for Yuba-like Films Using Twin Screw Extrusion
  10. Die Extrusion
  11. Flow Analyses in a Spiral Mandrel Die Assuming Wall Slip
  12. Effect of Elongational Viscosity on the Flow in a Flat Die
  13. Measuring Polymer Melt Density and Viscosity in Real-time during Extrusion Processes using Ultrasound Sensors Fusion
  14. Film
  15. Scale-up Rule for Double Bubble Tubular Process of PA6 Film
  16. Molding
  17. Analysis of the Morphological Development of PBT/ABS Blends during the Twin Screw Extrusion and Injection Molding Processes
  18. Investigation of the Mechanical Properties and Chemical Resistance of PC/PBT/Impact Modifier Blends
  19. Structure Development in Injection Molding of Isotactic Polypropylene, its Blends, Compounds and Dynamic Vulcanizates
  20. The Flow Behavior of Core Material and Breakthrough Phenomenon in Sandwich Injection Molding
  21. The Flow Behavior of Core Material and Breakthrough Phenomenon in Sandwich Injection Molding
  22. PPS News
  23. PPS News
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