These movies show the breakup of drops in a concentrated emulsion flow through a narrow constriction. For details, see Soft Matter, 10, 421-430, 2014.Flow rates (from top to bottom): 0.5 mL/hr, 1.5 mL/hr, 2.5 mL/hr, 3.5 mL/hr. Constriction width and height = 30 um:
This movie shows the alternate generation of two types of droplets in two T-junctions facing each other. These drops contain different laser dyes that emit different wavelengths when excited optically. The radius of the drops is about 20 micrometers. The video is > 100 times slower than real-time. Lab on a Chip, 9, 2767 - 2771, 2009.
This movie shows the real-time tuning of a microfluidic lens formed at the interface of two miscible liquids. As flow is turned on, the lens forms, and light is focused. When the flow stops, the lens disappears, and light becomes unfocused. Lab on a Chip, 8, 395–401, 2008
This movie shows the whispering gallery modes (WGM) in an expanding drop. The bright rim at the equator of the drop is characteristic of WGMs.
These movies show the generation of air bubbles in an eggwhite solution in a microfluidic channel. Flow conditions control the volume fraction of air to solution. It in turn controls the self-assembly, internal structure, and the rheology of the foam.