TY - JOUR
T1 - Study of the characteristics of the flow regimes and dynamics of coarse particles in pipeline transportation
AU - Ting, Xiong
AU - Xinzhuo, Zhang
AU - Miedema, Sape A.
AU - Xiuhan, Chen
PY - 2019
Y1 - 2019
N2 -
Slurry transport is a very important means of transporting solids through a pipeline. To improve the efficiency of slurry transport, especially in coarse particle transport, which is subject to problems such as strong resistance and easy blockage, more of the internal structure of the flow must be known. Empirical and analytical models are inadequate for this purpose. Therefore, in this study, a coupling mechanism is established between the computational fluid dynamics (CFD) and discrete element method (DEM). The CFD-DEM coupling was applied and research was conducted on the internal flow structure characteristics of microscopic motion and flow transition for coarse particles in a pipeline. The flow-regime transition processes of coarse 10-mm particles were analyzed qualitatively at velocities of 2 m·s
−1
, 5 m·s
−1
, 8 m·s
−1
and 10 m·s
−1
in a 0.1524-m diameter pipe, and quantitative analyses were performed on both the concentration distribution and the pressure gradient of particles in regimes of fixed bed flow, sliding bed flow and heterogeneous flow. Moreover, from the perspective of force analysis of particles, the law of sedimentation movement of particles is discussed, and the reason for the change in concentration distribution is explained. The research presented here provides insight into the internal structure of the flow and gives quantitative indications of pressure gradient and concentration distributions.
AB -
Slurry transport is a very important means of transporting solids through a pipeline. To improve the efficiency of slurry transport, especially in coarse particle transport, which is subject to problems such as strong resistance and easy blockage, more of the internal structure of the flow must be known. Empirical and analytical models are inadequate for this purpose. Therefore, in this study, a coupling mechanism is established between the computational fluid dynamics (CFD) and discrete element method (DEM). The CFD-DEM coupling was applied and research was conducted on the internal flow structure characteristics of microscopic motion and flow transition for coarse particles in a pipeline. The flow-regime transition processes of coarse 10-mm particles were analyzed qualitatively at velocities of 2 m·s
−1
, 5 m·s
−1
, 8 m·s
−1
and 10 m·s
−1
in a 0.1524-m diameter pipe, and quantitative analyses were performed on both the concentration distribution and the pressure gradient of particles in regimes of fixed bed flow, sliding bed flow and heterogeneous flow. Moreover, from the perspective of force analysis of particles, the law of sedimentation movement of particles is discussed, and the reason for the change in concentration distribution is explained. The research presented here provides insight into the internal structure of the flow and gives quantitative indications of pressure gradient and concentration distributions.
KW - CFD-DEM
KW - Coarse particles
KW - Concentration distribution
KW - Flow regimes analysis
KW - Horizontal hydraulic conveying
UR - http://www.scopus.com/inward/record.url?scp=85062453471&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2019.02.031
DO - 10.1016/j.powtec.2019.02.031
M3 - Article
AN - SCOPUS:85062453471
SN - 0032-5910
VL - 347
SP - 148
EP - 158
JO - Powder Technology
JF - Powder Technology
ER -