A high rate flow-focusing foam generator

Details A high rate flow-focusing foam generator A high rate flow-focusing foam generator

2006-01-05

arxiv.org/abs/physics/0601027v2

PHYSICS OF FLUIDS 18, 097103 (2006)

Physics

Fluid Dynamics

Scientific paper

10.1063/1.2353799

We use a rigid axisymetric microfluidic flow focusing device to produce monodisperse bubbles, dispersed in a surfactant solution. The gas volume fraction of the dispersion collected out of this device can be as large as 90%, demonstrating that foam with solid-like viscoelastic properties can be produced in this way. The polydispersity of the bubbles is so low that we observe crystallization of our foam. We measure the diameter of the bubbles and compare these data to recent theoretical predictions. The good control over bubble size and foam gas volume fraction shows that our device is a flexible and promising tool to produce calibrated foam at a high flow rate.

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