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Constrained Brownian Motion of a Single Ellipsoid in a Narrow Channel
Li HH(李瀚海); Zheng ZY(郑中玉); Wang YR(王育人)

We study the Brownian motion of a single ellipsoidal particle diffusing in a narrow channel by video-microscopy measurement. The experiments allow us to obtain the trajectories of ellipsoids and measure the diffusion coefficients. It is found that the channel constraints lead to suppression of the particle motion, especially the perpendicular motion to the channel, and the long axis of the particle tends to be parallel to the channel. A stable stratification phenomenon is observed, which is rarely discussed in studies of spherical particles. We also derive an approximate solution of theoretical prediction with the method of reflections, and obtain numerical simulation results using finite element software. They are proven to be effective by comparing them with the experimental results. All of these indicate that the aspect ratio and size of ellipsoid, the width of channel, and the transverse position distinctly affect the Brownian motion of ellipsoids.

Indexed BySCI ; CSCD
WOS IDWOS:000460822000013
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Funding ProjectNational Natural Science Foundation of China[U1738118] ; National Natural Science Foundation of China[11472275] ; Chinese Academy of Sciences[XDB22040301] ; Chinese Academy of Sciences[XDA04020202] ; Chinese Academy of Sciences[XDA04020406]
Funding OrganizationNational Natural Science Foundation of China ; Chinese Academy of Sciences
ContributorWang, YR
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.{Li, Han-Hai、Zheng, Zhong-Yu、Wang, Yu-Ren} Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100190, Peoples R China
2.{Li, Han-Hai、Zheng, Zhong-Yu、Wang, Yu-Ren} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
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GB/T 7714
Li HH,Zheng ZY,Wang YR. Constrained Brownian Motion of a Single Ellipsoid in a Narrow Channel[J]. CHINESE PHYSICS LETTERS,2019,36(3):4.
APA Li HH,Zheng ZY,&Wang YR.(2019).Constrained Brownian Motion of a Single Ellipsoid in a Narrow Channel.CHINESE PHYSICS LETTERS,36(3),4.
MLA Li HH,et al."Constrained Brownian Motion of a Single Ellipsoid in a Narrow Channel".CHINESE PHYSICS LETTERS 36.3(2019):4.
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