Droplets and Bubbles in Microfluidic Devices

Precise, tunable emulsions and foams produced in microfluidic geometries have found wide application in biochemical analysis and materials synthesis and characterization. Superb control of the volume, uniformity, and generation rate of droplets and bubbles arises from unique features of the microscale behavior of fluid interfaces. Fluid interfaces confined within microfluidic channels behave quite differently than their counterparts in unbounded flows. Confinement inhibits capillary instabilities so that breakup occurs by largely quasi-static mechanisms. The three-dimensional flow near confined interfaces in rectangular geometries and feedback effects from resistance changes in the entire microfluidic network…

• NS
  National Science Foundation

  Awards: 0730727, 0608864, 1033814
• AC
  American Chemical Society Petroleum Research Fund
• DO
  Division of Chemical, Bioengineering, Environmental, and Transport Systems