Mehrnia, Seyedmajid ; Kerres, Lara ; Kuhr, Maximilian M. G. ; Pelz, Peter F. (2024)
Rheological modelling of viscoelastic fluid in a generic gap of screw pump.
International Conference on Screw Machines (ICSM 2022). Dortmund, Germany (07.09. - 08.09.2022)
doi: 10.26083/tuprints-00026566
Konferenzveröffentlichung, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
In this study, the leakage of a non-Newtonian fluid, i.e. silicone oil, in a generic gap was numerically investigated. A CFD tool is used to determine the relationship between leakage flow, gap length and pressure difference. The investigated fluid is viscoelastic and its properties are modelled by a Maxwell equation. The Maxwell model can be used to precisely define the phenomenon of stress relaxation. Moreover, a comparison of the viscosity of measured data with simplified models shows that the Maxwell model is best suited for viscosity prediction. Furthermore, simulation results showed that at low pressures, leakage is reduced by decreasing the gap angle. However, this effect changes with increasing viscosity and relaxation time of the molecule. To determine the pressure drop, the Bagley plot is used. The results confirmed that as the shear rate increases, the elastic pressure drop values increase. In addition, the leakage flow increases with an increasing slenderness ratio.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Mehrnia, Seyedmajid ; Kerres, Lara ; Kuhr, Maximilian M. G. ; Pelz, Peter F. |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Rheological modelling of viscoelastic fluid in a generic gap of screw pump |
| Sprache: | Englisch |
| Publikationsjahr: | 29 Januar 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2022 |
| Ort der Erstveröffentlichung: | London [u.a.] |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | IOP Conference Series: Materials Science and Engineering |
| Jahrgang/Volume einer Zeitschrift: | 1267 |
| Kollation: | 14 Seiten |
| Veranstaltungstitel: | International Conference on Screw Machines (ICSM 2022) |
| Veranstaltungsort: | Dortmund, Germany |
| Veranstaltungsdatum: | 07.09. - 08.09.2022 |
| DOI: | 10.26083/tuprints-00026566 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/26566 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | In this study, the leakage of a non-Newtonian fluid, i.e. silicone oil, in a generic gap was numerically investigated. A CFD tool is used to determine the relationship between leakage flow, gap length and pressure difference. The investigated fluid is viscoelastic and its properties are modelled by a Maxwell equation. The Maxwell model can be used to precisely define the phenomenon of stress relaxation. Moreover, a comparison of the viscosity of measured data with simplified models shows that the Maxwell model is best suited for viscosity prediction. Furthermore, simulation results showed that at low pressures, leakage is reduced by decreasing the gap angle. However, this effect changes with increasing viscosity and relaxation time of the molecule. To determine the pressure drop, the Bagley plot is used. The results confirmed that as the shear rate increases, the elastic pressure drop values increase. In addition, the leakage flow increases with an increasing slenderness ratio. |
| ID-Nummer: | Artikel-ID: 012013 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-265661 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Institut für Fluidsystemtechnik (FST) (seit 01.10.2006) |
| Hinterlegungsdatum: | 29 Jan 2024 10:52 |
| Letzte Änderung: | 30 Jan 2024 06:50 |
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| Suche nach Titel in: | TUfind oder in Google |
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