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Article

A Network-Theory-Based Comparative Study of Melt-Conveying Models in Single-Screw Extrusion: A. Isothermal Flow

Institute of Polymer Extrusion and Compounding, Johannes Kepler University Linz, 4040 Linz, Austria
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Polymers 2018, 10(8), 929; https://doi.org/10.3390/polym10080929
Received: 29 June 2018 / Revised: 9 August 2018 / Accepted: 14 August 2018 / Published: 19 August 2018
(This article belongs to the Special Issue Model-Based Polymer Processing)
In many extrusion processes, the metering section is the rate-controlling part of the screw. In this functional zone, the polymer melt is pressurized and readied to be pumped through the die. We have recently proposed a set of heuristic models for predicting the flow behavior of power-law fluids in two- and three-dimensional metering channels. These novel theories remove the need for numerical simulations and can be implemented easily in practice. Here we present a comparative study designed to validate these new methods against experimental data. Extensive experiments were performed on a well-instrumented laboratory single-screw extruder, using various materials, screw designs, and processing conditions. A network-theory-based simulation routine was written in MATLAB to replicate the flow in the metering zones in silico. The predictions of the three-dimensional heuristic melt-conveying model for the axial pressure profile along the screw are in excellent agreement with the experimental extrusion data. To demonstrate the usefulness of the novel melt-flow theories, we additionally compared the models to a modified Newtonian pumping model known from the literature. View Full-Text
Keywords: modeling and simulation; polymer processing; extrusion modeling and simulation; polymer processing; extrusion
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MDPI and ACS Style

Marschik, C.; Roland, W.; Miethlinger, J. A Network-Theory-Based Comparative Study of Melt-Conveying Models in Single-Screw Extrusion: A. Isothermal Flow. Polymers 2018, 10, 929. https://doi.org/10.3390/polym10080929

AMA Style

Marschik C, Roland W, Miethlinger J. A Network-Theory-Based Comparative Study of Melt-Conveying Models in Single-Screw Extrusion: A. Isothermal Flow. Polymers. 2018; 10(8):929. https://doi.org/10.3390/polym10080929

Chicago/Turabian Style

Marschik, Christian, Wolfgang Roland, and Jürgen Miethlinger. 2018. "A Network-Theory-Based Comparative Study of Melt-Conveying Models in Single-Screw Extrusion: A. Isothermal Flow" Polymers 10, no. 8: 929. https://doi.org/10.3390/polym10080929

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