--- _id: '65007' author: - first_name: Felix full_name: Knaup, Felix id: '45124' last_name: Knaup - first_name: Volker full_name: Schöppner, Volker id: '20530' last_name: Schöppner citation: ama: Knaup F, Schöppner V. Improvement of a numerical two-phase simulation model for single-screw plasticizing extruders based on experimental investigations. International Polymer Processing. Published online 2025. doi:10.1515/ipp-2025-0072 apa: Knaup, F., & Schöppner, V. (2025). Improvement of a numerical two-phase simulation model for single-screw plasticizing extruders based on experimental investigations. International Polymer Processing. https://doi.org/10.1515/ipp-2025-0072 bibtex: '@article{Knaup_Schöppner_2025, title={Improvement of a numerical two-phase simulation model for single-screw plasticizing extruders based on experimental investigations}, DOI={10.1515/ipp-2025-0072}, journal={International Polymer Processing}, author={Knaup, Felix and Schöppner, Volker}, year={2025} }' chicago: Knaup, Felix, and Volker Schöppner. “Improvement of a Numerical Two-Phase Simulation Model for Single-Screw Plasticizing Extruders Based on Experimental Investigations.” International Polymer Processing, 2025. https://doi.org/10.1515/ipp-2025-0072. ieee: 'F. Knaup and V. Schöppner, “Improvement of a numerical two-phase simulation model for single-screw plasticizing extruders based on experimental investigations,” International Polymer Processing, 2025, doi: 10.1515/ipp-2025-0072.' mla: Knaup, Felix, and Volker Schöppner. “Improvement of a Numerical Two-Phase Simulation Model for Single-Screw Plasticizing Extruders Based on Experimental Investigations.” International Polymer Processing, 2025, doi:10.1515/ipp-2025-0072. short: F. Knaup, V. Schöppner, International Polymer Processing (2025). date_created: 2026-03-16T14:23:34Z date_updated: 2026-03-18T09:17:45Z department: - _id: '9' - _id: '321' - _id: '367' doi: 10.1515/ipp-2025-0072 keyword: - CFD simulation - melting modeling - melting process - polymer extrusion - single-screw extruder language: - iso: eng publication: International Polymer Processing quality_controlled: '1' status: public title: Improvement of a numerical two-phase simulation model for single-screw plasticizing extruders based on experimental investigations type: journal_article user_id: '59363' year: '2025' ... --- _id: '65005' author: - first_name: Felix full_name: Knaup, Felix id: '45124' last_name: Knaup - first_name: Florian full_name: Brüning, Florian last_name: Brüning - first_name: Volker full_name: Schöppner, Volker id: '20530' last_name: Schöppner citation: ama: 'Knaup F, Brüning F, Schöppner V. Improving an Analytical Model of Melting in Single Screw Extruders considering the Delay Zone Length. In: Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025). ; 2025.' apa: Knaup, F., Brüning, F., & Schöppner, V. (2025). Improving an Analytical Model of Melting in Single Screw Extruders considering the Delay Zone Length. Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025). bibtex: '@inproceedings{Knaup_Brüning_Schöppner_2025, title={Improving an Analytical Model of Melting in Single Screw Extruders considering the Delay Zone Length}, booktitle={Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025)}, author={Knaup, Felix and Brüning, Florian and Schöppner, Volker}, year={2025} }' chicago: Knaup, Felix, Florian Brüning, and Volker Schöppner. “Improving an Analytical Model of Melting in Single Screw Extruders Considering the Delay Zone Length.” In Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025), 2025. ieee: F. Knaup, F. Brüning, and V. Schöppner, “Improving an Analytical Model of Melting in Single Screw Extruders considering the Delay Zone Length,” 2025. mla: Knaup, Felix, et al. “Improving an Analytical Model of Melting in Single Screw Extruders Considering the Delay Zone Length.” Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025), 2025. short: 'F. Knaup, F. Brüning, V. Schöppner, in: Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025), 2025.' date_created: 2026-03-16T14:23:34Z date_updated: 2026-03-18T09:23:35Z department: - _id: '9' - _id: '321' - _id: '367' keyword: - Aufschmelzen - Aufschmelzmodellierung - delay zone - extrusion - melting modeling language: - iso: eng publication: Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025) quality_controlled: '1' status: public title: Improving an Analytical Model of Melting in Single Screw Extruders considering the Delay Zone Length type: conference user_id: '59363' year: '2025' ... --- _id: '65006' author: - first_name: Felix full_name: Knaup, Felix id: '45124' last_name: Knaup - first_name: Florian full_name: Brüning, Florian id: '72920' last_name: Brüning - first_name: Volker full_name: Schöppner, Volker id: '20530' last_name: Schöppner citation: ama: 'Knaup F, Brüning F, Schöppner V. Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder. In: Technomer 2025 29. Fachtagung. ; 2025.' apa: Knaup, F., Brüning, F., & Schöppner, V. (2025). Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder. Technomer 2025 29. Fachtagung. bibtex: '@inproceedings{Knaup_Brüning_Schöppner_2025, title={Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder}, booktitle={Technomer 2025 29. Fachtagung}, author={Knaup, Felix and Brüning, Florian and Schöppner, Volker}, year={2025} }' chicago: Knaup, Felix, Florian Brüning, and Volker Schöppner. “Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder.” In Technomer 2025 29. Fachtagung, 2025. ieee: F. Knaup, F. Brüning, and V. Schöppner, “Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder,” 2025. mla: Knaup, Felix, et al. “Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder.” Technomer 2025 29. Fachtagung, 2025. short: 'F. Knaup, F. Brüning, V. Schöppner, in: Technomer 2025 29. Fachtagung, 2025.' date_created: 2026-03-16T14:23:34Z date_updated: 2026-03-18T09:11:44Z department: - _id: '9' - _id: '321' - _id: '367' keyword: - Aufschmelzen - Aufschmelzmodellierung - Feststoffbett - melting modeling language: - iso: ger publication: Technomer 2025 29. Fachtagung publication_identifier: isbn: - 978-3-939382-17-1 status: public title: Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder type: conference user_id: '59363' year: '2025' ... --- _id: '65004' author: - first_name: Felix full_name: Knaup, Felix id: '45124' last_name: Knaup - first_name: Florian full_name: Brüning, Florian id: '72920' last_name: Brüning citation: ama: Knaup F, Brüning F. Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern. Extrusion. Published online 2025:28–33. apa: Knaup, F., & Brüning, F. (2025). Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern. Extrusion, 28–33. bibtex: '@article{Knaup_Brüning_2025, title={Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern}, journal={Extrusion}, author={Knaup, Felix and Brüning, Florian}, year={2025}, pages={28–33} }' chicago: Knaup, Felix, and Florian Brüning. “Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern.” Extrusion, 2025, 28–33. ieee: F. Knaup and F. Brüning, “Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern,” Extrusion, pp. 28–33, 2025. mla: Knaup, Felix, and Florian Brüning. “Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern.” Extrusion, 2025, pp. 28–33. short: F. Knaup, F. Brüning, Extrusion (2025) 28–33. date_created: 2026-03-16T14:23:34Z date_updated: 2026-03-30T10:38:05Z department: - _id: '9' - _id: '321' - _id: '367' keyword: - Aufschmelzen - extrusion - Messtechnik language: - iso: ger page: 28–33 publication: Extrusion status: public title: Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern type: journal_article user_id: '59363' year: '2025' ... --- _id: '59243' abstract: - lang: eng text: Most single-screw extruders used in the plastics processing industry are plasticizing extruders, designed to melt solid pellets or powders within the screw channel during processing. In many cases, the efficiency of the melting process acts as the primary throughput-limiting factor. If the material melts too late in the process, it may not be sufficiently mixed, resulting in substandard product quality. Accurate prediction of the melting process is therefore essential for efficient and cost-effective machine design. A practical method for engineers is the modeling of the melting process using mathematical–physical models that can be solved without complex numerical methods. These models enable rapid calculations while still providing sufficient predictive accuracy. This study revisits the modified Tadmor model by Potente, which describes the melting process and predicts the delay-zone length, extending from the hopper front edge to the point of melt pool formation. Based on extensive experimental investigations, this model is adapted by redefining the flow temperatures at the phase boundary and accounting for surface porosity at the beginning of the melting zone. Additionally, the effect of variable solid bed dynamics on model accuracy is examined. Significant model improvements were achieved by accounting for reduced heat flow into the solid bed due to the porous surface structure in the solid conveying zone, along with a new assumption for the flow temperature at the phase boundary between the solid bed and melt film. author: - first_name: Volker full_name: Schöppner, Volker id: '20530' last_name: Schöppner - first_name: Florian full_name: Brüning, Florian id: '72920' last_name: Brüning - first_name: Felix full_name: Knaup, Felix id: '45124' last_name: Knaup citation: ama: Schöppner V, Brüning F, Knaup F. Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders. Polymers. 2024;16(22):3130. doi:10.3390/polym16223130 apa: Schöppner, V., Brüning, F., & Knaup, F. (2024). Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders. Polymers, 16(22), 3130. https://doi.org/10.3390/polym16223130 bibtex: '@article{Schöppner_Brüning_Knaup_2024, title={Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders}, volume={16}, DOI={10.3390/polym16223130}, number={22}, journal={Polymers}, author={Schöppner, Volker and Brüning, Florian and Knaup, Felix}, year={2024}, pages={3130} }' chicago: 'Schöppner, Volker, Florian Brüning, and Felix Knaup. “Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders.” Polymers 16, no. 22 (2024): 3130. https://doi.org/10.3390/polym16223130.' ieee: 'V. Schöppner, F. Brüning, and F. Knaup, “Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders,” Polymers, vol. 16, no. 22, p. 3130, 2024, doi: 10.3390/polym16223130.' mla: Schöppner, Volker, et al. “Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders.” Polymers, vol. 16, no. 22, 2024, p. 3130, doi:10.3390/polym16223130. short: V. Schöppner, F. Brüning, F. Knaup, Polymers 16 (2024) 3130. date_created: 2025-04-02T09:51:32Z date_updated: 2025-04-02T11:21:00Z department: - _id: '9' - _id: '321' - _id: '367' doi: 10.3390/polym16223130 intvolume: ' 16' issue: '22' keyword: - delay zone - extrusion - melting modeling language: - iso: eng page: '3130' publication: Polymers quality_controlled: '1' status: public title: Improvement in an Analytical Approach for Modeling the Melting Process in Single-Screw Extruders type: journal_article user_id: '59363' volume: 16 year: '2024' ...