NUMERICAL STUDY ON THE SEDIMENTED MOTION CHARACTERISTICS OF THREE ALIGNED CIRCULAR PARTICLES IN THE INCLINED CHANNELS

Hu Ping; Zhang Xingwei; Niu Xiaodong; Meng Hui

doi:10.6052/0459-1879-14-059

Volume 46 Issue 5

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Chinese Journal of Theoretical and Applied Mechanics > 2014 > 46(5): 673-684. > DOI: 10.6052/0459-1879-14-059 CSTR: 32045.14.0459-1879-14-059

Hu Ping, Zhang Xingwei, Niu Xiaodong, Meng Hui. NUMERICAL STUDY ON THE SEDIMENTED MOTION CHARACTERISTICS OF THREE ALIGNED CIRCULAR PARTICLES IN THE INCLINED CHANNELS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2014, 46(5): 673-684. DOI: 10.6052/0459-1879-14-059

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NUMERICAL STUDY ON THE SEDIMENTED MOTION CHARACTERISTICS OF THREE ALIGNED CIRCULAR PARTICLES IN THE INCLINED CHANNELS

College of Engineering, Shantou University, Shantou 515063, China

Funds: The project was supported by the National Natural Science Foundation of China (11372168), the Second-batch Leading Talent Project of Guangdong Province in China(51375287), and the Natural Science Foundation of Guangdong Province of China (S2013040013876).

Received Date: March 04, 2014
Revised Date: April 08, 2014

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Abstract

Abstract

The immersed boundary-lattice Boltzmann method (IB-LBM) is used to numerically investigate the sedimented motion characteristics of three rigid circular particles in the inclined channels. The gravity is considered, and the inclined angles of the channels are sequentially changed from 0° to 90°. The effect of inclined angles on the sedimented motion characteristics is firstly investigated. Present results show that the lagging particle will surpass the leading particle when inclined angles of channel are larger than 59°. Then, the effect of Re number on the sedimented characteristics is also studied. This study finds that the aggregation time of three particles decreases as Re number increases. In addition, this study also finds that the non-uniformity of the diameters of three circular particles can alter the sedimented characteristics. When the diameters of three longitudinally aligned particles gradually become smaller, the aggregation time can be shorten. The aggregation of the particles can also be accelerated as long as the diameter of particles in the middle is larger than the diameters of other two adjacent particles. Present results can provide useful information for related problems in environmental engineering and geology.
- IB-LBM,
- inclined channel,
- rigid circular particles,
- sedimentation

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NUMERICAL STUDY ON THE SEDIMENTED MOTION CHARACTERISTICS OF THREE ALIGNED CIRCULAR PARTICLES IN THE INCLINED CHANNELS