Formation of dispersions using “flow focusing” in microchannels | Zendy

Shelley L. Anna | Zendy; Nathalie Bontoux | Zendy; Howard A. Stone | Zendy

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Formation of dispersions using “flow focusing” in microchannels

Author(s) -

Shelley L. Anna,

Nathalie Bontoux,

Howard A. Stone

Publication year - 2003

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1537519

Subject(s) - flow focusing , body orifice , drop (telecommunication) , materials science , mechanics , volumetric flow rate , dispersity , microfluidics , two phase flow , thread (computing) , pressure drop , phase diagram , flow coefficient , flow (mathematics) , thermodynamics , optics , nanotechnology , chemistry , phase (matter) , physics , polymer chemistry , mechanical engineering , organic chemistry , engineering

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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