Abstract
We present experimental findings on the flowability and avalanching behavior of cohesive powders in a rotating drum. The main goal – beyond the scope of the current study – is to develop a method to understand and predict phenomena that precede the occurrences of events like avalanches and then to simulate this with the Discrete Element Method. In the present study, we focus on the characterization, classification, and description of the various events possible in cohesive powders – other than in non-cohesive particle systems – during rotation in a drum. Events are categorized based on their nature and we speculate on their relation to the micro-structure and properties of the powder. As main result, we show that repeatable and consistent results can be obtained in the characterization of cohesive powders when angle–based (e.g. local surface and global center-of-mass) parameters are used. Different events can be distinguished, especially for strong cohesion, bulk shear sliding is often replaced by other events like slumping.
Original language | English |
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Title of host publication | Powders and Grains 2013 |
Subtitle of host publication | Proceedings of the 7th International Conference on Micromechanics of Granular Media |
Editors | Aibing Yu, Kejun Dong, Runyu Yang, Stefan Luding |
Publisher | American Institute of Physics |
Pages | 983-986 |
ISBN (Print) | 978-0-7354-1166-1 |
DOIs | |
Publication status | Published - 8 Jul 2013 |
Event | 7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013 - Sydney, Australia Duration: 8 Jul 2013 → 12 Jul 2013 Conference number: 7 http://www.pg2013.unsw.edu.au/ |
Publication series
Name | AIP conference proceedings |
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Publisher | AIP Publishing LLC |
Volume | 1542 |
ISSN (Print) | 0094-243X |
ISSN (Electronic) | 1551-7616 |
Conference
Conference | 7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013 |
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Abbreviated title | Powders & Grains |
Country/Territory | Australia |
City | Sydney |
Period | 8/07/13 → 12/07/13 |
Internet address |
Keywords
- Cohesive powders
- Avalanches
- Cocoa
- Rotating drum
- PARDEM