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Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels
Li HH(李瀚海); Zheng ZY(郑中玉); Xie T(谢天); Wang YR(王育人)
Corresponding AuthorZheng, Zhong-Yu(zzy@imech.ac.cn) ; Wang, Yu-Ren(yurenwang@imech.ac.cn)
Source PublicationCHINESE PHYSICS B
2019-07-01
Volume28Issue:7Pages:6
ISSN1674-1056
AbstractThe self-diffusion problem of Brownian particles under the constraint of quasi-one-dimensional (q1D) channel has raised wide concern. The hydrodynamic interaction (HI) plays an important role in many practical problems and two-body interactions remain dominant under q1D constraint. We measure the diffusion coefficient of individual ellipsoid when two ellipsoidal particles are close to each other by video-microscopy measurement. Meanwhile, we obtain the numerical simulation results of diffusion coefficient using finite element software. We find that the self-diffusion coefficient of the ellipsoid decreases exponentially with the decrease of their mutual distance X when X < X-0, where X-0 is the maximum distance of the ellipsoids to maintain their mutual influence, X-0 and the variation rate are related to the aspect ratio p = a/b. The mean squared displacement (MSD) of the ellipsoids indicates that the self-diffusion appears as a crossover region, in which the diffusion coefficient increases as the time increases in the intermediate time regime, which is proven to be caused by the spatial variations affected by the hydrodynamic interactions. These findings indicate that hydrodynamic interaction can significantly affect the self-diffusion behavior of adjacent particles and has important implications to the research of microfluidic problems in blood vessels and bones, drug delivery, and lab-on-chip.
Keywordhydrodynamic interaction self-diffusion ellipsoids channel
DOI10.1088/1674-1056/28/7/074701
Indexed BySCI ; EI
Language英语
WOS IDWOS:000476831100001
WOS KeywordANOMALOUS DIFFUSION ; SEMIDILUTE ; NANOPARTICLES ; MOBILITY ; MOTION
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Funding ProjectNational Natural Science Foundation of China[U1738118] ; National Natural Science Foundation of China[11372314] ; Strategic Priority Research Program on Space Science ; Chinese Academy of Sciences[XDA04020202] ; Chinese Academy of Sciences[XDA04020406] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040301]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program on Space Science ; Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
ClassificationQ3
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79483
Collection国家微重力实验室
Recommended Citation
GB/T 7714
Li HH,Zheng ZY,Xie T,et al. Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels[J]. CHINESE PHYSICS B,2019,28(7):6.
APA 李瀚海,郑中玉,谢天,&王育人.(2019).Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels.CHINESE PHYSICS B,28(7),6.
MLA 李瀚海,et al."Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels".CHINESE PHYSICS B 28.7(2019):6.
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