Melt conveying in single-screw extruders: modeling and simulation

C Marschik, W Roland, TA Osswald - Polymers, 2022 - mdpi.com
Numerous analyses have modeled the flow of polymer melts in the melt-conveying zones of
single-screw extruders. While initial studies mainly provided exact analytical results for …

A network-theory-based comparative study of melt-conveying models in single-screw extrusion: A. isothermal flow

C Marschik, W Roland, J Miethlinger - Polymers, 2018 - mdpi.com
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 …

[HTML][HTML] Symbolic regression models for predicting viscous dissipation of three-dimensional non-Newtonian flows in single-screw extruders

W Roland, C Marschik, M Krieger, B Löw-Baselli… - Journal of Non …, 2019 - Elsevier
Modeling the flow of non-Newtonian melts in single-screw extruders generally requires
numerical methods. In this study, we analyze viscous dissipation for fully developed flow of …

Extended regression models for predicting the pumping capability and viscous dissipation of two-dimensional flows in single-screw extrusion

W Roland, M Kommenda, C Marschik, J Miethlinger - Polymers, 2019 - mdpi.com
Generally, numerical methods are required to model the non-Newtonian flow of polymer
melts in single-screw extruders. Existing approximation equations for modeling the …

[HTML][HTML] Predicting the co-extrusion flow of non-Newtonian fluids through rectangular ducts–A hybrid modeling approach

A Hammer, W Roland, C Marschik… - Journal of Non-Newtonian …, 2021 - Elsevier
Co-extrusion has become the state-of-the-art process technology in nearly all application
areas of polymer processing. By combining different types of polymeric materials within …

Heuristic analysis of viscous dissipation in single‐screw extrusion

W Roland, J Miethlinger - Polymer Engineering & Science, 2018 - Wiley Online Library
Modeling the non‐Newtonian flow of polymer melts in single‐screw extrusion generally
requires numerical methods. This study analyzes the viscous dissipation of the melt …

[PDF][PDF] Application of hybrid modeling in polymer processing

C Marschik, W Roland, B Löw-Baselli… - Proceedings of the …, 2020 - researchgate.net
For many decades, the setup and solution of polymer processing models involved use of
analytical or numerical methods. These characteristics have changed with the recent …

[PDF][PDF] The effect of channel curvature on the flow rate and viscous dissipation of power-law fluids

W Roland, C Marschik, B Löw-Baselli… - SPE ANTEC Tech …, 2018 - researchgate.net
When modeling the melt-conveying zone of singlescrew extruders, generally the flat-plate
model is applied. Using a cylindrical reference frame, we investigated the effect of channel …

[PDF][PDF] A Heuristic Model for Predicting Three-Dimensional Non-Newtonian Flows in Metering Channels

C Marschik, T Osswald, W Roland… - SPE ANTEC Tech …, 2018 - researchgate.net
Being able to include the shear-thinning behavior of polymer melts in the theoretical
analysis of meltconveying and pressurization generally involves the application of numerical …

[PDF][PDF] An Experimental Validation of a Heuristic Melt-Conveying Model for Single-Screw Extruders

C Marschik, W Roland, B Löw-Baselli… - SPE ANTEC Technical …, 2019 - researchgate.net
From a functional point of view, the single-screw extrusion process can be divided into
several processing steps, one of which involves melt conveying and pressurization. To …