| Joule heating effects on electroosmotic flow in insulator-based dielectrophoresis | |
Sridharan S; Zhu JJ; Hu GQ(胡国庆) ; Xuan XC; Xuan, XC (reprint author), Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA
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| Source Publication | Electrophoresis
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| 2011 | |
| Volume | 32Issue:17Pages:2274-2281 |
| ISSN | 0173-0835 |
| Abstract | 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. |
| Keyword | 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 |
| Subject Area | Biochemistry & Molecular Biology ; Chemistry |
| DOI | 10.1002/elps.201100011 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000295216200005 |
| WOS Keyword | ELECTRIC-FIELDS ; ELECTRODELESS DIELECTROPHORESIS ; MICROFLUIDIC SYSTEMS ; PARTICLE SEPARATION ; AC ELECTROKINETICS ; FLUID-FLOW ; CELLS ; MANIPULATION ; SIZE ; MICROCHANNELS |
| WOS Research Area | Biochemistry & Molecular Biology ; Chemistry |
| WOS Subject | Biochemical Research Methods ; Chemistry, Analytical |
| Funding Organization | 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. |
| Department | LNM微纳米流体力学 |
| Classification | 二类/Q1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/44910 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Xuan, XC (reprint author), Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA |
| Recommended Citation 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,&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. |
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