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Numerical Simulation of Polymer Coextrusion Flows
A Criterion for Detection of “Wave” Interfacial Instability Onset
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M. Zatloukal
Veröffentlicht/Copyright:
5. Juni 2013
Abstract
Non-isothermal calculation of flow history dependent visco-elastic stresses in a coextrusion die is performed using the 8-mode modified Leonov constitutive equation and the deformation rate field from finite element simulations. It is shown that a heuristic criterion based on the difference of normal stress differences across the layer interfaces in the merging area may be used to potentially detect the onset of interfacial instabilities. The developed technique can be a useful tool for coextrusion die design as well as for proper selection of materials and process conditions for coextrusion.
Received: 2000-8-23
Accepted: 2001-4-2
Published Online: 2013-06-05
Published in Print: 2001-05-01
© 2001, Carl Hanser Verlag, Munich
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Artikel in diesem Heft
- Editorial
- Ninth of a Series Pioneer of the Modular Co-rotating Twin Screw Extruder–Rudolf Erdmenger (1911–1991)
- Internal Mixer
- The “New-Generation” Co-flow Intermeshing Internal Mixer
- Screw Extrusion/Continuous Mixers
- Twin Screw Compounding of PE-HD Wood Flour Composites
- A Transient Melting Model of Polymer Balls Sliding Against the Barrel
- Prediction of Screw Length Required for Polymer Melting and Melting Characteristics
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- The Mapping Method for Mixing Optimization Part I: The Multiflux Static Mixer
- The Mapping Method for Mixing Optimization
- Reactive Processing
- Comparison Studies of Anionic Polymerization of Caprolactam in Different Twin Screw Extruders
- Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
- Coextrusion
- Convective Instabilities in the Coextrusion Process
- Numerical Simulation of Polymer Coextrusion Flows
- Thermoforming
- Tight Tolerance Thermoforming
Artikel in diesem Heft
- Editorial
- Ninth of a Series Pioneer of the Modular Co-rotating Twin Screw Extruder–Rudolf Erdmenger (1911–1991)
- Internal Mixer
- The “New-Generation” Co-flow Intermeshing Internal Mixer
- Screw Extrusion/Continuous Mixers
- Twin Screw Compounding of PE-HD Wood Flour Composites
- A Transient Melting Model of Polymer Balls Sliding Against the Barrel
- Prediction of Screw Length Required for Polymer Melting and Melting Characteristics
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- Melting of Polymer Blends in Co-rotating Twin Screw Extruders
- The Mapping Method for Mixing Optimization Part I: The Multiflux Static Mixer
- The Mapping Method for Mixing Optimization
- Reactive Processing
- Comparison Studies of Anionic Polymerization of Caprolactam in Different Twin Screw Extruders
- Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
- Coextrusion
- Convective Instabilities in the Coextrusion Process
- Numerical Simulation of Polymer Coextrusion Flows
- Thermoforming
- Tight Tolerance Thermoforming
