Encyclopedia of Microfluidics and Nanofluidics

Living Edition
| Editors: Dongqing Li

Flow Bifurcation in Microchannel

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27758-0_539-2
  • 227 Downloads

Synonyms

Definition

Flow bifurcation in microchannels is discussed in this entry. In this entry, flow bifurcation refers to geometrical bifurcation. Specifically, the transport of droplets in microchannel where a mother branch bifurcates into two daughter branches with thermocapillary effects is examined.

Overview

Microchannel bifurcations have been employed in manipulating droplets. These manipulations include but are not limited to droplet fusion and splitting. Fusing of droplets has been demonstrated using a microchannel with three bifurcating branches [1]. A bifurcating T-junction can be employed to split a droplet into two daughter droplets of smaller size [2]. The relative size of the two daughter droplets is determined by the length of the branches. A longer branch creates larger resistance to flow, therefore creating smaller daughter droplet. In the extreme case where one of the branches is sufficiently long, the droplet does not break but...

This is a preview of subscription content, log in to check access.

References

  1. 1.
    Tan YC, Fisher JS, Lee AI, Cristini V, Phillip A (2004) Design of microfluidic channel geometries for the control of droplet volume, chemical concentration and sorting. Lab Chip 4:292–298CrossRefGoogle Scholar
  2. 2.
    Link DR, Anna SL, Weitz DA, Stone HA (2004) Geometrically mediated breakup of drops in microfluidic devices. Phys Rev Lett 92(5):054503/1–054503/4CrossRefGoogle Scholar
  3. 3.
    Ting TH, Yap YF, Nguyen NT, Wong TN, John JC, Yobas L (2006) Thermally mediated breakup of drops in microchannels. Appl Phys Lett 89(23):234101/1–234101/3CrossRefGoogle Scholar
  4. 4.
    Osher S, Sethian JA (1988) Fronts propagating with curvature-dependent speed: algorithms based on Hamilton-Jacobi formulations. J Comput Phys 79:12–49CrossRefzbMATHMathSciNetGoogle Scholar
  5. 5.
    Brackbill JU, Kothe DB, Zemach C (1992) A continuum method for modelling surface tension. J Comput Phys 100:335–354CrossRefzbMATHMathSciNetGoogle Scholar
  6. 6.
    Yap YF, Chai JC, Wong TN, Toh KC, Zhang HY (2006) A global mass correction scheme for the level-set method. Numer Heat Trans B 50:455–472CrossRefGoogle Scholar
  7. 7.
    Patankar SV (1980) Numerical heat transfer and fluid flow. Hemisphere, New YorkzbMATHGoogle Scholar
  8. 8.
    Van Leer B (1974) Towards the ultimate conservative difference scheme. II. Monotonicity and conservation combined in a second-order scheme. J Comput Phys 14:361–370CrossRefzbMATHGoogle Scholar

Authors and Affiliations

  1. 1.School of Mechanical and Aerospace EngineeringNanyang Technological UniversitySingaporeSingapore
  2. 2.Department of Mechanical EngineeringThe Petroleum InstituteAbu DhabiUnited Arab Emirates