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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