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
Article
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2009 |
| Creators: | Teufelsbauer, Harald ; Wang, Yongqi ; Chiou, Min-Ching ; Wu, W. |
| Type of entry: | Bibliographie |
| Title: | Flow-obstacle interaction in rapid granular avalanches: DEM simulation and comparison with experiment |
| Language: | English |
| Date: | 2009 |
| Publisher: | Springer |
| Journal or Publication Title: | Granular Matter |
| Volume of the journal: | 11 |
| Issue Number: | 4 |
| DOI: | 10.1007/s10035-009-0142-6 |
| URL / URN: | http://www.springerlink.com/content/f837334345422496/ |
| 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. |
| Uncontrolled Keywords: | Physics and Astronomy |
| Additional Information: | DOI: 10.1007/s10035-009-0142-6 |
| Divisions: | 16 Department of Mechanical Engineering > Fluid Dynamics (fdy) 16 Department of Mechanical Engineering |
| Date Deposited: | 24 Aug 2011 18:13 |
| Last Modified: | 07 Dec 2017 10:14 |
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