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Cho, Yoon-Kyoung
Integrated Nano-Biotech Lab (INBL)
Research Interests
  • Microfluidics, Lab-on-a-chip, personalized biomedical diagnostics, nanobioengineering

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Mixing enhancement by using electrokinetic instability under time-periodic electric field

Cited 32 times inthomson ciCited 39 times inthomson ci
Title
Mixing enhancement by using electrokinetic instability under time-periodic electric field
Author
Shin, SMKang, ISCho, Yoon-Kyoung
Issue Date
2005-03
Publisher
IOP PUBLISHING LTD
Citation
JOURNAL OF MICROMECHANICS AND MICROENGINEERING, v.15, no.3, pp.455 - 462
Abstract
Experimental studies have been performed to apply electrokinetic instability as a means of fluid mixing. A time-periodic electric field is introduced to excite the instability in a cross channel. It is generated by the sum of a static field and an alternating field. The characteristics of instability have been considered with the frequency of applied electric field as a key parameter. Through the frequency sweeping from 0.1 Hz to 50 Hz, it has been found that the instability is most enhanced when the period of the applied electric field is close to half of the period of instability in the form of a sinusoidal wave generated under a the static electric field. This fact may be explained based on the concept of hydrodynamic resonance. The degree of mixing is evaluated quantitatively by analyzing the distribution of fluorescent dye and it is confirmed that there exists an optimal frequency for enhancement of fluid mixing. The existence of the optimal frequency is expected to provide a valuable guideline for the design of an efficient micro-mixer.
URI
https://scholarworks.unist.ac.kr/handle/201301/5894
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=15544383514
DOI
10.1088/0960-1317/15/3/005
ISSN
0960-1317
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BME_Journal Papers
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