Principal Investigator
Sindy K.Y. Tang, Ph.D.
Dept. of Mechanical Engineering
Stanford University

Videos

Droplet Breakup

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:
Flow rate: 0.2 mL/hr. Constriction width and height = 30 um:
Flow rate: 0.8 mL/hr. Constriction width and height = 30 um:
Flow rate: 0.8 mL/hr. Constriction width and height = 30 um:

Droplet Generation

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.



Optofluidics: Liquid-Liquid Lens

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



Optofluidics: Whispering Gallery Mode in Drops

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.



Eggwhite Foams

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.

© 2014 Tang Group @ Stanford University. All rights reserved.