This work extends a one-dimensional continuum model for granular flows down inclined planes [C. H. Lee and C. J. Huang, “Kinetic-theory-based model of dense granular flows down inclined planes,” Phys. Fluids 24, 073303 (2012)] to solve three-dimensional problems involving both static and flow states. The new model decomposes the shear stress and pressure into enduring-contact and kinetic components. One novelty of the present model is the determination of the enduring-contact component of pressure, which is a composition of a pressure depending only on the volume fraction and a pressure derived from the dilatancy law together with the equation of state from the kinetic theory. Another novelty of this study is a new numerical scheme that can avoid numerical instability caused by large volume fractions. To demonstrate its capability, the present model is applied to simulate the collapse of a granular column with various aspect ratios. The evolution of the column shape, the flow field, the final height, and the run-out predicted by the present model agree well with those provided by discrete element methods and experiments.
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November 2015
Research Article|
November 20 2015
A three-dimensional continuum model incorporating static and kinetic effects for granular flows with applications to collapse of a two-dimensional granular column
Cheng-Hsien Lee;
Cheng-Hsien Lee
1Department of Civil and Environmental Engineering,
National University of Singapore
, Singapore
1175762Department of Water Resources and Environmental Engineering,
Tamkang University
, New Taipei City 25137, Taiwan
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Zhenhua Huang;
Zhenhua Huang
a)
3Department of Ocean and Resources Engineering, School of Ocean and Earth Science and Technology,
University of Hawaii at Manoa
, Honolulu, Hawaii 96822, USA
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Yee-Meng Chiew
Yee-Meng Chiew
4School of Civil and Environmental Engineering,
Nanyang Technological University
, Singapore
639798
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a)
Author to whom correspondence should be addressed. Electronic mail: zhenhua@hawaii.edu
Physics of Fluids 27, 113303 (2015)
Article history
Received:
June 03 2014
Accepted:
October 08 2015
Citation
Cheng-Hsien Lee, Zhenhua Huang, Yee-Meng Chiew; A three-dimensional continuum model incorporating static and kinetic effects for granular flows with applications to collapse of a two-dimensional granular column. Physics of Fluids 1 November 2015; 27 (11): 113303. https://doi.org/10.1063/1.4935626
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