Article
Licensed
Unlicensed Requires Authentication

Numerical Calculation of the Velocity and Temperature Field in the Reverse Roll Coating

  • and
Published/Copyright: June 21, 2013
Become an author with De Gruyter Brill
Submit Manuscript Author Information
International Polymer Processing
From the journal International Polymer Processing Volume 13 Issue 4

Abstract

Rotating rolls are used to distribute liquids onto papers or other materials in order to coat their surfaces with thin films for further technical applications of the composed materials. In this contribution a numerical method is applied which solves the momentum balance in the liquid phase with the support of the Finite Element Method (FEM), taking free surfaces into consideration. The coupled equations of momentum and energy are solved on the basis of the Boundary Element Method (BEM). The process parameters are summarized in the friction number, the capillary number, the Reynolds number, the Stokes number and several ratios of the linear dimensions. Their influence on the fields of pressure, velocity, tension, and temperature is investigated and displayed graphically. A temperature gradient superimposed to the flow through the gap between the roll surfaces results in an additional influence on the velocity field and the coating thickness. The results of the numerical calculations are approximated by rather simple empirical equations.

* Mail address: Prof. Dr.-Ing. D. Mewes, Institute fur Verfahrenstechnik, Universität Hannover, Hannover, Germany
Received: 1998-5-17
Accepted: 1998-7-23
Published Online: 2013-06-21
Published in Print: 1998-12-01

© 1998, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Fourth in a Series: Pioneers of Polymer Processing Alexander Parkes
  5. Screw Extrusion/Mixing
  6. Flow Analysis in Screw Extruders-Effect of Kinematic Conditions
  7. Distributive Mixing in an Axial Discharge Continous Mixer
  8. Fluid Mechanics of Intermeshing Counter-Rotating Twin Screw Extruders
  9. Stress-Strain and Volume Change Characteristics of an Assemblage of Polymer Pellets
  10. Utilization of Recycled Crumb Rubber as a Compounding Tool
  11. Fibers and Films
  12. Manufacture-Induced Inaccuracies of Spinning Dies1
  13. Modeling of Segmented Polyurethane Drying Process
  14. Roll Coating
  15. Numerical Calculation of the Velocity and Temperature Field in the Reverse Roll Coating
  16. Molding
  17. Simulation of Reactive Liquid Composite Molding
  18. Consistency and Flexibility of Multi Cavity Melt Control
  19. Structure and Properties of Injection Moldings of β-Crystal Nucleator-added PP
  20. Structure and Properties of Injection Moldings of β-Crystal Nucleator-added PP
  21. Warpage of Injection Moulded Plates and Corner Products
https://doi.org/10.3139/217.980379

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Fourth in a Series: Pioneers of Polymer Processing Alexander Parkes
  5. Screw Extrusion/Mixing
  6. Flow Analysis in Screw Extruders-Effect of Kinematic Conditions
  7. Distributive Mixing in an Axial Discharge Continous Mixer
  8. Fluid Mechanics of Intermeshing Counter-Rotating Twin Screw Extruders
  9. Stress-Strain and Volume Change Characteristics of an Assemblage of Polymer Pellets
  10. Utilization of Recycled Crumb Rubber as a Compounding Tool
  11. Fibers and Films
  12. Manufacture-Induced Inaccuracies of Spinning Dies1
  13. Modeling of Segmented Polyurethane Drying Process
  14. Roll Coating
  15. Numerical Calculation of the Velocity and Temperature Field in the Reverse Roll Coating
  16. Molding
  17. Simulation of Reactive Liquid Composite Molding
  18. Consistency and Flexibility of Multi Cavity Melt Control
  19. Structure and Properties of Injection Moldings of β-Crystal Nucleator-added PP
  20. Structure and Properties of Injection Moldings of β-Crystal Nucleator-added PP
  21. Warpage of Injection Moulded Plates and Corner Products
Downloaded on 2.4.2026 from https://www.degruyterbrill.com/document/doi/10.3139/217.980379/html
Scroll to top button