Coquand, Olivier und Sperl, Matthias (2021) Rheology of granular liquids in extensional flows: Beyond the μ(I)-law. Physical Review E, 104, 014604. American Physical Society. doi: 10.1103/PhysRevE.104.014604. ISSN 2470-0045.
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Offizielle URL: https://doi.org/10.1103/PhysRevE.104.014604
Kurzfassung
The Granular Integration Through Transients (GITT) formalism gives a theoretical description of the rheology of moderately dense granular flows and suspensions. In this work, we extend the GITT equations beyond the case of simple shear flows studied before. Applying this to the particular example of extensional flows, we show that the predicted behavior is somewhat different from that of the more frequently studied simple shear case, as illustrated by the possibility of non monotonous evolution of the effective friction coefficient μ with the inertial number J. By the reduction of the GITT equations to simple toy-models, we provide a generalization of the μ(J)-law true for any type of flow deformation. Our analysis also includes a study of the Trouton ratio, which is shown to behave quite similarly to that of dense colloidal suspensions.
elib-URL des Eintrags: | https://elib.dlr.de/142848/ | ||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
Titel: | Rheology of granular liquids in extensional flows: Beyond the μ(I)-law | ||||||||||||
Autoren: |
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Datum: | 12 Juli 2021 | ||||||||||||
Erschienen in: | Physical Review E | ||||||||||||
Referierte Publikation: | Ja | ||||||||||||
Open Access: | Ja | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Ja | ||||||||||||
In ISI Web of Science: | Ja | ||||||||||||
Band: | 104 | ||||||||||||
DOI: | 10.1103/PhysRevE.104.014604 | ||||||||||||
Seitenbereich: | 014604 | ||||||||||||
Verlag: | American Physical Society | ||||||||||||
ISSN: | 2470-0045 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | granular rheology, elongation, | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||
HGF - Programmthema: | Forschung unter Weltraumbedingungen | ||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||
DLR - Forschungsgebiet: | R FR - Forschung unter Weltraumbedingungen | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Modellsysteme | ||||||||||||
Standort: | Köln-Porz | ||||||||||||
Institute & Einrichtungen: | Institut für Materialphysik im Weltraum | ||||||||||||
Hinterlegt von: | Sperl, Matthias | ||||||||||||
Hinterlegt am: | 16 Sep 2021 09:30 | ||||||||||||
Letzte Änderung: | 27 Okt 2023 14:09 |
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