锥形微通道内液滴自输运特性及力学驱动机制研究

逄明华; 刘焜; 刘小君

doi:10.21656/1000-0887.370158

锥形微通道内液滴自输运特性及力学驱动机制研究

doi: 10.21656/1000-0887.370158

¹合肥工业大学摩擦学研究所, 合肥 230009;²河南科技学院机电学院, 河南新乡 453003

基金项目: 国家自然科学基金(51375132)

详细信息

作者简介:
逄明华（1977—），男，博士生(E-mail: pangminghua909@163.com);刘焜（1963—），男，教授，博士生导师(通讯作者. E-mail: liukun@hfut.edu.cn).

中图分类号: TB17
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- 文章访问数: 1450
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- 被引次数: 0
出版历程
- 收稿日期: 2016-05-23
- 修回日期: 2016-06-14
- 刊出日期: 2017-03-15

Droplets’ Directional Motion Characteristics in Conical Microchannels and Driving Mechanisms

¹Institute of Tribology, Hefei University of Technology, Hefei 230009, P.R.China;²School of Mechanical and Electrical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan 453003, P.R.China

Funds: The National Natural Science Foundation of China(51375132)

摘要

摘要: 针对液体在微通道内的自输运特性，采用数值仿真与能量解析相结合的方法研究了液滴在锥形微通道内的自输运特性及力学驱动机制，得到微通道的锥形角、液滴与微通道内壁的接触角及微通道的润湿性对液滴自输运特性的影响关系.分析表明，微通道的锥形角、液滴与微通道内壁的接触角均能影响液滴的自输运方向及驱动力大小.对于亲水性微通道，微通道的锥形角、液滴与微通道内壁的接触角其作用效果呈现整体形态；对于疏水性微通道，微通道的锥形角、液滴与微通道内壁的接触角其作用效果呈现局域形态.这可为研究液体在微通道内的自输运机理及界面内液体细观流动机制奠定理论基础.
- 锥形微通道 /
- 自输运特性 /
- 接触角 /
- 润湿性
Abstract: The droplets’ directional motion characteristics in conical microchannels with different wetting properties and driving mechanisms were studied with the numerical simulation method and the energy-based analytical method to clarify the mechanisms for directional motions of liquid in nature. The effects of the conical angle, the contact angle between the droplet and the microchannel wall as well as the microchannel wetting property on the directional motion characteristics of the droplet in the conical microchannel, were obtained. The energy-based theoretical analysis and the numerical simulation both indicate that, the conical angle and the contact angle substantially influence the motion direction and the driving force of the droplet, but with different effectivenesses. The effectiveness is in holistic consistency in the hydrophilic conical microchannel, but local features emerge in the hydrophobic conical microchannel. The study provides a theoretic base for the research of directional motion mechanisms and microfluidic flow mechanisms in the solid interface.
- conical microchannel /
- directional motion /
- contact angle /
- wetting property

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参考文献(22)

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锥形微通道内液滴自输运特性及力学驱动机制研究

doi: 10.21656/1000-0887.370158

作者简介:
逄明华（1977—），男，博士生(E-mail: pangminghua909@163.com);刘焜（1963—），男，教授，博士生导师(通讯作者. E-mail: liukun@hfut.edu.cn).

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Droplets’ Directional Motion Characteristics in Conical Microchannels and Driving Mechanisms

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留言板

锥形微通道内液滴自输运特性及力学驱动机制研究

doi: 10.21656/1000-0887.370158

作者简介: 逄明华（1977—），男，博士生(E-mail: pangminghua909@163.com);刘焜（1963—），男，教授，博士生导师(通讯作者. E-mail: liukun@hfut.edu.cn).

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出版历程

Droplets’ Directional Motion Characteristics in Conical Microchannels and Driving Mechanisms

计量

出版历程

目录

作者简介:
逄明华（1977—），男，博士生(E-mail: pangminghua909@163.com);刘焜（1963—），男，教授，博士生导师(通讯作者. E-mail: liukun@hfut.edu.cn).