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Flow-obstacle interaction in rapid granular avalanches: DEM simulation and comparison with experiment

Teufelsbauer, Harald ; Wang, Yongqi ; Chiou, Min-Ching ; Wu, W. (2009)
Flow-obstacle interaction in rapid granular avalanches: DEM simulation and comparison with experiment.
In: Granular Matter, 11 (4)
doi: 10.1007/s10035-009-0142-6
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

This paper investigates the interaction between rapid granular flow and an obstacle. The distinct element method (DEM) is used to simulate the flow regimes observed in laboratory experiments. The relationship between the particle properties and the overall flow behaviour is obtained by using the DEM with a simple linear contact model. The flow regime is primarily controlled by the particle friction, viscous normal damping and particle rotation rather than the contact stiffness. Rolling constriction is introduced to account for dispersive flow. The velocity depth-profiles around the obstacles are not uniform but varying over the depth. The numerical results are compared with laboratory experiments of chute flow with dry granular material. Some important model parameters are obtained, which can be used to optimize defense structures in alpine regions.

Typ des Eintrags: Artikel
Erschienen: 2009
Autor(en): Teufelsbauer, Harald ; Wang, Yongqi ; Chiou, Min-Ching ; Wu, W.
Art des Eintrags: Bibliographie
Titel: Flow-obstacle interaction in rapid granular avalanches: DEM simulation and comparison with experiment
Sprache: Englisch
Publikationsjahr: 2009
Verlag: Springer
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Granular Matter
Jahrgang/Volume einer Zeitschrift: 11
(Heft-)Nummer: 4
DOI: 10.1007/s10035-009-0142-6
URL / URN: http://www.springerlink.com/content/f837334345422496/
Kurzbeschreibung (Abstract):

This paper investigates the interaction between rapid granular flow and an obstacle. The distinct element method (DEM) is used to simulate the flow regimes observed in laboratory experiments. The relationship between the particle properties and the overall flow behaviour is obtained by using the DEM with a simple linear contact model. The flow regime is primarily controlled by the particle friction, viscous normal damping and particle rotation rather than the contact stiffness. Rolling constriction is introduced to account for dispersive flow. The velocity depth-profiles around the obstacles are not uniform but varying over the depth. The numerical results are compared with laboratory experiments of chute flow with dry granular material. Some important model parameters are obtained, which can be used to optimize defense structures in alpine regions.

Freie Schlagworte: Physics and Astronomy
Zusätzliche Informationen:

DOI: 10.1007/s10035-009-0142-6

Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy)
16 Fachbereich Maschinenbau
Hinterlegungsdatum: 24 Aug 2011 18:13
Letzte Änderung: 07 Dez 2017 10:14
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