| Synchronization and control of capillary flows in rectangular microchannel with spacers | |
Song K1 ; Zhang LN1; Zhou Z1; Huang RJ1; Zheng X(郑旭)2
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| 发表期刊 | BIOMICROFLUIDICS
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| 2020-07-01 | |
| 卷号 | 14期号:4页码:10 |
| 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. |
| DOI | 10.1063/5.0010175 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000549739000001 |
| 关键词[WOS] | LIQUID FLOW ; DRIVEN ; VALVES ; PUMPS |
| WOS研究方向 | Biochemistry & Molecular Biology ; Biophysics ; Science & Technology - Other Topics ; Physics |
| WOS类目 | Biochemical Research Methods ; Biophysics ; Nanoscience & Nanotechnology ; Physics, Fluids & Plasmas |
| 项目资助者 | 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] |
| 论文分区 | 二类 |
| 力学所作者排名 | 1 |
| RpAuthor | Song, Kui ; Zheng, Xu |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/84754 |
| 专题 | 非线性力学国家重点实验室 |
| 作者单位 | 1.Xiangtan Univ, Coll Civil Engn & Mech, Xiangtan 411105, Hunan, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, 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. |
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| Jp2020198.pdf（2950KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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