IMECH-IR  > 非线性力学国家重点实验室
Inertial migrations of cylindrical particles in rectangular microchannels: Variations of equilibrium positions and equivalent diameters
Su JH; Chen XD(陈晓东); Hu GQ(胡国庆)
Source PublicationPHYSICS OF FLUIDS
2018
Conference Name8th Meeting of the Hellenic-Society-of-Rheology
Conference DateJUL 12-14, 2017
Conference PlaceLimassol, CYPRUS
AbstractInertial migration has emerged as an efficient tool for manipulating both biological and engineered particles that commonly exist with non-spherical shapes in microfluidic devices. There have been numerous studies on the inertial migration of spherical particles, whereas the non-spherical particles are still largely unexplored. Here, we conduct three-dimensional direct numerical simulations to study the inertial migration of rigid cylindrical particles in rectangular microchannels with different width/height ratios under the channel Reynolds numbers (Re) varying from 50 to 400. Cylindrical particles with different length/diameter ratios and blockage ratios are also concerned. Distributions of surface force with the change of rotation angle show that surface stresses acting on the particle end near the wall are the major contributors to the particle rotation. We obtain lift forces experienced by cylindrical particles at different lateral positions on cross sections of two types of microchannels at various Re. It is found that there are always four stable equilibrium positions on the cross section of a square channel, while the stable positions are two or four in a rectangular channel, depending on Re. By comparing the equilibrium positions of cylindrical particles and spherical particles, we demonstrate that the equivalent diameter of cylindrical particles monotonously increases with Re. Our work indicates the influence of a non-spherical shape on the inertial migration and can be useful for the precise manipulation of non-spherical particles. Published by AIP Publishing.
WOS IDWOS:000428930500023
Funding OrganizationThis work was supported financially by the National Natural Science Foundation of China (NSFC) (Grant Nos. 11572334, 11402274, and 11772343), the CAS Strategic Priority Research Program (No. XDB22040403), and the CAS Key Research Program of Frontier Sciences (No. QYZDB-SSW-JSC036).
URL查看原文
Indexed ByCPCI-S ; EI
Language英语
Citation statistics
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/75550
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
Su JH,Chen XD,Hu GQ. Inertial migrations of cylindrical particles in rectangular microchannels: Variations of equilibrium positions and equivalent diameters[C]PHYSICS OF FLUIDS,2018.
Files in This Item: Download All
File Name/Size DocType Version Access License
CPCI2017005.pdf(6321KB)会议论文 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Su JH]'s Articles
[陈晓东]'s Articles
[胡国庆]'s Articles
Baidu academic
Similar articles in Baidu academic
[Su JH]'s Articles
[陈晓东]'s Articles
[胡国庆]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Su JH]'s Articles
[陈晓东]'s Articles
[胡国庆]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: CPCI2017005.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.