Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Microchannels for the Flow Control of Two Fluids with Different Volumes

부피가 다른 두 유체의 효과적인 유동제어를 위한 미세채널

  • La, Moon-Woo (Dept. of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Ho, Jae-Yun (Dept. of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Kim, Dong-Sung (Dept. of Mechanical Engineering, Pohang University of Science and Technology)
  • 라문우 (포항공과대학교 기계공학과) ;
  • 호재윤 (포항공과대학교 기계공학과) ;
  • 김동성 (포항공과대학교 기계공학과)
  • Received : 2011.08.31
  • Accepted : 2011.10.17
  • Published : 2012.01.01
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Abstract

In this paper, microchannels for the flow control of two fluids with different volumes have been designed, fabricated, and verified. The dimensions of the inlets were determined based on the Stokes equation in order to realize that the flow of the two fluids meet at the same time, and to maintain a certain configuration when the flows passed through each inlet channel. The designed microchannels were confirmed using computational fluid dynamics simulation for the incompressible, Newtonian, and transient flows. In addition, a microfluidic system containing the designed microchannels was fabricated by soft lithography, and the pressure-driven flows of the two fluids were characterized by microfluidic experiments.

본 연구에서는 부피가 다른 두 유체의 효과적인 유동제어를 위하여 Stokes 유동 방정식을 기반으로 설계된 미세채널을 제안한다. 부피가 다른 두 유체가 압력 구동에 의하여 주입구를 통과하는 과정에서, 두 유동이 동시에 만나 주어진 부피비를 유지하며 흘러나간 후에 일시에 끝날 수 있도록 주입구의 폭과 길이를 조절하였다. 디자인된 미세채널은 비압축성, 뉴턴 유체의 과도상태 유동에 대한 전산유체역학 모사를 수행하였다. 또한, 소프트리소그래피를 통해 미세유체칩을 제작하고, 압력 구동에 의한 부피가 다른 두 유체의 유동 특성을 평가하였다.

Keywords

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