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Melt Conveying in Single-Screw Extruders: Modeling and Simulation
Christian Marschik1, Wolfgang Roland2, Tim A Osswald3
1Competence Center CHASE GmbH, Altenbergerstrasse 69, 4040 Linz, Austria.
Polymers
|March 10, 2022
Summary
This review details historical methods for modeling polymer melt flow in single-screw extruders, covering analytical, numerical, and approximate approaches for Newtonian and non-Newtonian fluids.
Area of Science:
- Polymer Science
- Chemical Engineering
- Materials Science
Background:
- Polymer melt flow in single-screw extruders is crucial for plastics processing.
- Early models focused on Newtonian fluids, limiting applicability to complex polymer behaviors.
- Advancements in computing power enable more sophisticated simulations.
Purpose of the Study:
- To review historical methodologies for modeling polymer melt flow in single-screw extruders.
- To compare analytical, numerical, and approximate methods.
- To highlight mathematical models and boundary conditions.
Main Methods:
- Review of exact analytical solutions for Newtonian fluids.
- Analysis of numerical methods for shear-thinning and non-isothermal flows.
- Examination of approximate methods and their mathematical underpinnings.
Main Results:
- Progress in simulating complex polymer flows due to computational advancements.
- Detailed comparison of mathematical models and boundary conditions across different methodologies.
- Revisiting literature on leakage flow and curved-channel systems.
Conclusions:
- A comprehensive historical overview of polymer melt flow modeling in extruders is presented.
- The evolution from simple analytical solutions to complex numerical simulations is evident.
- Understanding these methodologies is key to optimizing extrusion processes.
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