Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
권호 표지

EFFECT OF THE ZETA POTENTIAL CONTROL BY THE TRAPEZOIDAL ELECTRODES IN A MICROCHANNEL ON ENHANCEMENT MIXING-PERFORMANCE

마이크로 채널 내 사다리꼴 전극의 제타 포텐셜 변화에 따른 혼합효과 증대에 대한 수치해석적 연구

  • 서용권 (동아대학교 기계공학부) ;
  • 허형석 (동아대학교 기계공학부) ;
  • 강금분 (동아대학교 기계공학과 대학원)
  • Published : 2006.09.01
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Abstract

This paper presents the numerical results of fluid flow and mixing in a microfluidic device for electro-osmotic flow (EOF) with an trapezoidal electrode array on the bottom wall (ETZEA). Differently from previous EOF in a channel which only transports fluid in colloidal system. ETZEA can also be utilized to mix a target liquid with a reagent. In this study we propose a method of controlling fluid flow and mixing enhancement. To obtain the flow and mixing characteristics, numerical computations are performed by using a commercial code, CFX-10, and a self-made code LBM-D. It was found that the flow near the trapezoidal electrode in the ETZEA is of 3-D complex flows due to the zeta potential difference between the trapezoidal electrode and channel walls, and as a consequence the hetrogeneous zeta potential on the electrodes plays an important role in mixing the liquid.

Keywords

References

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