Single-particle dynamics in a low-Reynolds-number fluid under spherical confinement

doi:10.1017/jfm.2023.572

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Single-particle dynamics in a low-Reynolds-number fluid under spherical confinement
	Chen GF(陈高峰); Jiang XK(蒋玺恺)
刊名	JOURNAL OF FLUID MECHANICS
	2023-08-14
卷号	969 页码:A15
关键词	microfluidics particle/fluid flow
ISSN号	0022-1120
DOI	10.1017/jfm.2023.572
英文摘要	Non-colloidal dynamics of a single particle suspended in a low-Reynolds-number fluid under spherical confinement was studied numerically. We calculated hydrodynamic mobilities of a sphere, a prolate spheroid and an oblate spheroid parallel and transverse to the particle-cavity line of centres. The mobilities show maximum in the cavity centre and decay as the particle moves towards the no-slip wall. For prolate and oblate spheroids, their mobilities are also affected by the angle between the particle's axis of revolution and the particle-cavity line of centres due to particle anisotropy. It was observed that the effect of particle anisotropy becomes stronger as the confinement level increases. When the external force on the particle is not parallel or transverse to the particle-cavity line of centres, a drift velocity perpendicular to the force occurs because of the confinement-induced anisotropy of the mobility in the cavity. The normalized drift velocity depends on the particle location, size, shape and orientation of the non-spherical particle. We also studied the motion of a non-neutrally buoyant particle under external forces in a rotating flow inside the cavity. Cooperation between the external force, rotation-induced centrifugal or centripetal force and the force from particle-wall interactions leads to multiple modes of particle motion. A fundamental understanding of single-particle dynamics in this work forms the basis for studying more complex particle dynamics in intracellular transport, and can guide particle manipulation in microfluidic applications ranging from droplet-based microreactors to microfluidic encapsulation.
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:001048130600001
其他责任者	Jiang, XK (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Jiang, XK (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92557]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.{Chen, Gaofeng, Jiang, Xikai} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.{Chen, Gaofeng, Jiang, Xikai} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen GF,Jiang XK. Single-particle dynamics in a low-Reynolds-number fluid under spherical confinement[J]. JOURNAL OF FLUID MECHANICS,2023,969:A15.
APA	陈高峰,&蒋玺恺.(2023).Single-particle dynamics in a low-Reynolds-number fluid under spherical confinement.JOURNAL OF FLUID MECHANICS,969,A15.
MLA	陈高峰,et al."Single-particle dynamics in a low-Reynolds-number fluid under spherical confinement".JOURNAL OF FLUID MECHANICS 969(2023):A15.