Experiments and CFD-DEM simulations of cohesive particles sedimentation in stilled fluid

doi:10.1016/j.powtec.2019.05.018

	Experiments and CFD-DEM simulations of cohesive particles sedimentation in stilled fluid
	Lu, Runrun 2; Zhang, Lin 2; Ricoux, Philippe 1; Wang, Limin 2
刊名	POWDER TECHNOLOGY
	2019-11-01
卷号	356 页码:222-230
关键词	Cohesive force CED-DEM Coefficient quantization Correlation method
ISSN号	0032-5910
DOI	10.1016/j.powtec.2019.05.018
英文摘要	Particle agglomeration is observed in slurry loop reactors due to the presence of cohesive force between the swollen polyethylene (PE) particles, which has direct impact on the hydrodynamics predictions. However, a qualitative study of the cohesive forces in the suspensions of swollen PE particle at the microscopic level is still lacking. In this study, a simulation contrast experiment method for quantification of cohesive force is proposed. The simulation method is based on a coupled computational fluid dynamics and discrete element method (CFD-DEM) approach, which have been used to study and explain the effects of cohesion on fluidization of particles. The DEM allows the dynamic simulation of the solid phase motion by tracking individual particles, whereas a CFD algorithm is commonly used to simulate the flow field of the continuous fluid phase. The swollen PE particles, initially arranged within a cylinder region in a quiescent hot dodecane, are made to fall, and their sedimentation induces the liquid flow around them. The interactions between the particle motion and the liquid flow are favorably compared with the experimental data, demonstrating the value of the cohesive energy density for the swollen PE particles is between 4000 J/m(3) and 5000 J/m(3). (C) 2019 Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[51776212] ; National Natural Science Foundation of China[91434113] ; National Key R&D Program of China[2018YFB1500902] ; Chinese Academy of Sciences[QYZDB-SSW-SYS029] ; National Key Basic Research Program of China[2015CB251402]
WOS关键词	NUMERICAL-SIMULATION ; SURFACE-ENERGY ; GAS ; ADHESION ; MODEL ; FLOW ; CONTACT ; VORTEX ; SPHERE ; BED
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000504777100023
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Chinese Academy of Sciences ; National Key Basic Research Program of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/38563]
专题	中国科学院过程工程研究所
通讯作者	Wang, Limin
作者单位	1.TOTAL Sci Div, Data Proc & Modeling, 24 Cours Michelet La Def 10, F-92069 Paris, France 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lu, Runrun,Zhang, Lin,Ricoux, Philippe,et al. Experiments and CFD-DEM simulations of cohesive particles sedimentation in stilled fluid[J]. POWDER TECHNOLOGY,2019,356:222-230.
APA	Lu, Runrun,Zhang, Lin,Ricoux, Philippe,&Wang, Limin.(2019).Experiments and CFD-DEM simulations of cohesive particles sedimentation in stilled fluid.POWDER TECHNOLOGY,356,222-230.
MLA	Lu, Runrun,et al."Experiments and CFD-DEM simulations of cohesive particles sedimentation in stilled fluid".POWDER TECHNOLOGY 356(2019):222-230.