Synchronization and control of capillary flows in rectangular microchannel with spacers

doi:10.1063/5.0010175

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

	Synchronization and control of capillary flows in rectangular microchannel with spacers
	Song K 2; Zhang LN 2; Zhou Z 2; Huang RJ 2; Zheng X(郑旭)1
刊名	BIOMICROFLUIDICS
	2020-07-01
卷号	14 期号:4 页码:10
DOI	10.1063/5.0010175
英文摘要	Liquid control in microchannels is quite important in microfluidic devices used in, for example, lab-on-a-chip and point-of-care applications. Capillary microfluidics, being self-powered, is especially advantageous for use in passive devices, and has attracted significant attention. In this paper, capillary flows in rectangular microchannels with spacers are studied experimentally and theoretically; in particular, capillary flow synchronization (or waiting) behavior is identified and investigated. Based on changes of channel walls, two basic synchronization modes are proposed for flows isolated by spacers in a channel. Experimental results show that the velocities of faster capillary flows are reduced by the liquid pinning effect and that the time delay between two capillary flows is automatically balanced. The synchronization behavior of capillary flows is explained by analyzing the time delay, contact angle variation, and capillary forces. In addition, the quantity of liquid flowing out of the waiting channels is estimated and verified. Then a model for the change in contact angle during synchronization is derived and verified. Finally, we conceive a series of studies of the control of capillary flows for different spacer designs and conduct an experiment to study the dynamic behaviors of a number of capillary flows by adding many spacers in a microchannel. This study expands the applications of capillary microfluidics.
分类号	二类
WOS关键词	LIQUID FLOW ; DRIVEN ; VALVES ; PUMPS
WOS研究方向	Biochemistry & Molecular Biology ; Biophysics ; Science & Technology - Other Topics ; Physics
语种	英语
WOS记录号	WOS:000549739000001
资助机构	National Natural Science Foundation of China[11702236] ; National Natural Science Foundation of China[11832017] ; National Natural Science Foundation of China[11572335] ; Natural Science Foundation of Hunan Province[2018JJ3489] ; Opening Fund of State Key Laboratory of Nonlinear Mechanics ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDB-SSW-JSC036] ; Chinese Academy of Sciences Strategic Priority Research Program[XDB22040403]
其他责任者	Song, Kui ; Zheng, Xu
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/84754]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Xiangtan Univ, Coll Civil Engn & Mech, Xiangtan 411105, Hunan, Peoples R China;
推荐引用方式 GB/T 7714	Song K,Zhang LN,Zhou Z,et al. Synchronization and control of capillary flows in rectangular microchannel with spacers[J]. BIOMICROFLUIDICS,2020,14(4):10.
APA	Song K,Zhang LN,Zhou Z,Huang RJ,&郑旭.(2020).Synchronization and control of capillary flows in rectangular microchannel with spacers.BIOMICROFLUIDICS,14(4),10.
MLA	Song K,et al."Synchronization and control of capillary flows in rectangular microchannel with spacers".BIOMICROFLUIDICS 14.4(2020):10.