期刊
POWDER TECHNOLOGY
卷 239, 期 -, 页码 115-127出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.powtec.2013.01.057
关键词
DEM; Dry granular flow; Flowing regime; Granular temperature; Classification of granular flows
资金
- National Natural Science Foundation of China [41201012]
- National Basic Research Program of China (973 Program) [2010CB731504]
- Chinese Academy of Sciences [SDS-135-1204-01]
- Hundred Young Talents Program of the Institute of Mountain Hazards and Environment
Understanding the characteristics and mechanics of granular flows along sloping channels is fundamental and vital for the study of different in situ geophysical flows. Using the discrete element method (DEM), three-dimensional (3-D) dry granular flows are numerically modeled to study the contact behavior of solid particles along sloping channels, determine the 3-D velocity profiles along the flow height, and computer the corresponding shear rate. The channel confinement effect on granular flows is also investigated. By capturing the flow height and utilizing the definition of the Savage number, the variation in flow regimes inside a granular body along a sloping channel is researched. Finally, the fluctuation of solid particles in the flow is investigated with the use of granular temperature, and is proven to be influenced by the Savage number. Analysis shows that the combination of granular temperature and the Savage number is a good way to identify the flow regimes of granular flows. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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