Joule heating effects on electroosmotic flow in insulator-based dielectrophoresis
文献类型：期刊论文
| 作者 | Sridharan S; Zhu JJ; Hu GQ(胡国庆) ; Xuan XC
|
| 刊名 | Electrophoresis
 |
| 出版日期 | 2011 |
| 卷号 | 32期号:17页码:2274-2281 |
| 通讯作者邮箱 | xcxuan@clemson.edu |
| 关键词 | Electroosmotic Flow Electrothermal Flow Insulator-Based Dielectrophoresis Joule Heating Microfluidics Electric-Fields Electrodeless Dielectrophoresis Microfluidic Systems Particle Separation Ac Electrokinetics Fluid-Flow Cells Manipulation Size Microchannels |
| ISSN号 | 0173-0835 |
| 产权排序 | [Sridharan, Sriram; Zhu, Junjie; Xuan, Xiangchun] Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA; [Hu, Guoqing] Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China |
| 通讯作者 | Xuan, XC (reprint author), Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA |
| 合作状况 | 国际 |
| 中文摘要 | Insulator-based dielectrophoresis (iDEP) is an emerging technology that has been successfully used to manipulate a variety of particles in microfluidic devices. However, due to the locally amplified electric field around the in-channel insulator, Joule heating often becomes an unavoidable issue that may disturb the electroosmotic flow and affect the particle motion. This work presents the first experimental study of Joule heating effects on electroosmotic flow in a typical iDEP device, e. g. a constriction microchannel, under DC-biased AC voltages. A numerical model is also developed to simulate the observed flow pattern by solving the coupled electric, energy, and fluid equations in a simplified two-dimensional geometry. It is observed that depending on the magnitude of the DC voltage, a pair of counter-rotating fluid circulations can occur at either the downstream end alone or each end of the channel constriction. Moreover, the pair at the downstream end appears larger in size than that at the upstream end due to DC electroosmotic flow. These fluid circulations, which are reasonably simulated by the numerical model, form as a result of the action of the electric field on Joule heating-induced fluid inhomogeneities in the constriction region. |
| 学科主题 | Biochemistry & Molecular Biology; Chemistry |
| 分类号 | 二类/Q1 |
| 类目[WOS] | Biochemical Research Methods ; Chemistry, Analytical |
| 研究领域[WOS] | Biochemistry & Molecular Biology ; Chemistry |
| 关键词[WOS] | ELECTRIC-FIELDS ; ELECTRODELESS DIELECTROPHORESIS ; MICROFLUIDIC SYSTEMS ; PARTICLE SEPARATION ; AC ELECTROKINETICS ; FLUID-FLOW ; CELLS ; MANIPULATION ; SIZE ; MICROCHANNELS |
| 收录类别 | SCI |
| 资助信息 | This work was supported by NSF under grant CBET-0853873 and by Clemson University through a start-up package (X. X.). The support from the Knowledge Innovation Program of CAS (KJCX2-YW-H18) (G. H.) is also gratefully appreciated. |
| 原文出处 | http://dx.doi.org/10.1002/elps.201100011 |
| 语种 | 英语 |
| WOS记录号 | WOS:000295216200005 |
| 公开日期 | 2012-04-01 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/44910]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Sridharan S,Zhu JJ,Hu GQ,et al. Joule heating effects on electroosmotic flow in insulator-based dielectrophoresis[J]. Electrophoresis,2011,32(17):2274-2281. |
| APA | Sridharan S,Zhu JJ,胡国庆,&Xuan XC.(2011).Joule heating effects on electroosmotic flow in insulator-based dielectrophoresis.Electrophoresis,32(17),2274-2281. |
| MLA | Sridharan S,et al."Joule heating effects on electroosmotic flow in insulator-based dielectrophoresis".Electrophoresis 32.17(2011):2274-2281. |
入库方式： OAI收割
来源：力学研究所
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