한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제8권4호
  • /
  • Pages.43-47
  • /
  • 2010
  • /
  • 1598-8430(pISSN)
  • /
  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
권호 표지
DOI QR코드

DOI QR Code

마이크로 채널 내부에서의 액적의 쌍안정성과 이를 활용한 유동 제어

Droplet Bistability in Microchannel and its Application to Flow Control

  • 이범준 (서울대학교 기계항공공학부) ;
  • 유정열 (서울대학교 기계항공공학부)
  • 투고 : 2010.12.09
  • 심사 : 2010.12.27
  • 발행 : 2010.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

We demonstrate the droplet bistability in a microchannel which has two symmetric necks that operate as capillary valves. It is shown that there are certain flow conditions, determined by droplet velocity and droplet size, to achieve bistability. Droplet bistabililty allows simple but precise control of droplet at a bifurcation channel. Therefore, by an appropriate channel design to induce droplet bistability, we can distribute droplets at a junction passively in the manner of perfect alternation and perfect switching in the choice of the outlets.

키워드

참고문헌

  1. John Paul Urbanski, William Thies, Christopher Rhodes, Saman Amarasinghe and Todd Thorsen, 2006, “Digital microfluidics using soft lithography,” Lab Chip, Vol. 6, p. 96 https://doi.org/10.1039/b510127a
  2. Wei Wang, Chun Yang, and Chang Ming Li, 2009, “Efficient On-Demand Compound Droplet Formation: From Microfluidics to Microdroplets as Miniaturized Laboratories,” Small, Vol. 5(10), p. 1149.
  3. Jinjie Shi, Xiaole Mao, Daniel Ahmed, Ashley Colletti and Tony Jun Huang, 2008, “Focusing microparticles in a microfluidic channel with standing surface acoustic waves (SSAW),” Lab Chip, Vol. 8, p. 221. https://doi.org/10.1039/b716321e
  4. Manu Prakash and Neil Gershenfeld, 2007, “Microfluidic Bubble Logic,” Science, Vol. 315, p. 832. https://doi.org/10.1126/science.1136907
  5. Wilfried Engl, Matthieu Roche, Annie Colin, and Pascal Panizza, 2005, “Droplet Traffic at a Simple Junction at Low Capillary Numbers,” PRL, Vol. 95, p. 208304. https://doi.org/10.1103/PhysRevLett.95.208304
  6. Michael Schindler and Armand Ajdari, 2008, “Droplet Traffic in Microfluidic Networks: A Simple Model for Understanding and Designing,” PRL, Vol. 100, p. 044501. https://doi.org/10.1103/PhysRevLett.100.044501
  7. Galder Cristobal, Jean-Philippe Benoit, and Mathieu Joanicot, 2006, “Microfluidic bypass for efficient passive regulation of droplet traffic at a junction,” APL, Vol. 89, p. 034104.