Droplet-based Multiphase Flows in Microchannels

Modeling T-Junction Devices with FLOW-3D

In T-Junction devices, the disperse phase and the continuous phase are injected from two branches of the “T.” Droplets of the disperse phase are produced as a result of the shear force and interfacial tension at the fluid–fluid interface.

Comparison of FLOW-3D numerical simulation results with experimental results

Comparison of FLOW-3D results with experimental
results taken from Helen Song, Joshua D. Tice,
and Rustem F. Ismagilov, "A Microfluidic System for
Controlling Reaction Networks in Time," Angewandte
Chemie International Edition 20003, 42 , No.7

Schematic of a T-junction device that can be modeled with FLOW-3D

This system has microchannels with 50x50 μm2 cross sections and hydrophobic surfaces
fabricated using rapid prototyping in polydimethylsiloxane (PDMS).

Flow simulation of the mixing pattern of Reagent A

Flow simulation of the mixing pattern of Reagent B

Formation of uniform droplets out of multiple aqueous streams. The left animation shows the mixing pattern of
reagent A; The right animation shows the mixing pattern of reagent B.