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Formation of dispersions using ‘‘flow focusing’’ in microchannels

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journal contribution
posted on 01.01.2003, 00:00 authored by Shelley AnnaShelley Anna, Nathalie Bontoux, Howard A Stone
A flow-focusing geometry is integrated into a microfluidic device and used to study drop formation in liquid–liquid systems. A phase diagram illustrating the drop size as a function of flow rates and flow rate ratios of the two liquids includes one regime where drop size is comparable to orifice width and a second regime where drop size is dictated by the diameter of a thin ‘‘focused’’ thread, so drops much smaller than the orifice are formed. Both monodisperse and polydisperse emulsions can be produced.


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© 2003 American Institute of Physics



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