Investigation of particle size impact on dense particulate flows in a vertical pipe

doi:10.1063/5.0157609

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Investigation of particle size impact on dense particulate flows in a vertical pipe
	Ren WL(任万龙); Zhang XH(张旭辉); Zhang Y(张岩); Li P(李鹏); Lu XB(鲁晓兵)
刊名	PHYSICS OF FLUIDS
	2023-07-01
卷号	35 期号:7 页码:73302
ISSN号	1070-6631
DOI	10.1063/5.0157609
英文摘要	In this work, a semi-resolved computational fluid dynamics-discrete element method is employed to study the effects of fluid-particle and particle-particle/wall interactions on particle mixing and segregation behaviors and particle dynamics with different particle sizes in a vertical pipe. There are two species of particles with the same density in the vertical pipe: d(1) = 10 (species 1) and d(2) = 2-7 mm (species 2), and species 2 contains both fine and coarse particles. The Stokes number St(p) is introduced to characterize the effects of different particle sizes on particle dynamics. First, the particle mixing and segregation behaviors with different size ratios are qualitatively analyzed. By comparing with smaller size ratios, obvious granular plugs and stronger contact force networks occur at larger size ratios. Second, after the segregation of species 1 and 2, the differences in dynamic characteristics between fine and coarse particles are explored. The normalized autocorrelation length scale, which is the ratio of propagation length of particle velocity fluctuations and particle diameter, is significantly different from fine to coarse particles. One notable feature is that two different flow regimes are found through the radial distribution function. Furthermore, the hydrodynamic stress and collision stress are defined to study the mechanism for the differences between fine and coarse particles. The results imply that the reason for the differences is that the collision effects go beyond the hydrodynamic effects with the increase in the Stokes number.
分类号	一类/力学重要期刊
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001023449800013
资助机构	National Natural Science Foundation of China [12132018] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA22000000] ; Youth Innovation Promotion Association of Chinese Academy of Sciences [2017027]
其他责任者	Zhang, Y (corresponding author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92590]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.{Ren, Wan-Long, Zhang, Xu-Hui, Zhang, Yan, Li, Peng, Lu, Xiao-Bing} Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.{Ren, Wan-Long, Zhang, Xu-Hui, Lu, Xiao-Bing} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ren WL,Zhang XH,Zhang Y,et al. Investigation of particle size impact on dense particulate flows in a vertical pipe[J]. PHYSICS OF FLUIDS,2023,35(7):73302.
APA	任万龙,张旭辉,张岩,李鹏,&鲁晓兵.(2023).Investigation of particle size impact on dense particulate flows in a vertical pipe.PHYSICS OF FLUIDS,35(7),73302.
MLA	任万龙,et al."Investigation of particle size impact on dense particulate flows in a vertical pipe".PHYSICS OF FLUIDS 35.7(2023):73302.