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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
Source PublicationElectrophoresis
2011
Volume32Issue:17Pages:2274-2281
ISSN0173-0835
AbstractInsulator-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.
KeywordElectroosmotic 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 AreaBiochemistry & Molecular Biology ; Chemistry
DOI10.1002/elps.201100011
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000295216200005
WOS KeywordELECTRIC-FIELDS ; ELECTRODELESS DIELECTROPHORESIS ; MICROFLUIDIC SYSTEMS ; PARTICLE SEPARATION ; AC ELECTROKINETICS ; FLUID-FLOW ; CELLS ; MANIPULATION ; SIZE ; MICROCHANNELS
WOS Research AreaBiochemistry & Molecular Biology ; Chemistry
WOS SubjectBiochemical Research Methods ; Chemistry, Analytical
Funding OrganizationThis 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.
DepartmentLNM微纳米流体力学
Classification二类/Q1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44910
Collection非线性力学国家重点实验室
Corresponding AuthorXuan, 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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