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. 2003 Apr 11;90(14):144505.
doi: 10.1103/PhysRevLett.90.144505. Epub 2003 Apr 11.

Ordered and disordered patterns in two-phase flows in microchannels

Remi Dreyfus  1 , Patrick Tabeling, Herve Willaime
Affiliations

Ordered and disordered patterns in two-phase flows in microchannels

Remi Dreyfus et al. Phys Rev Lett. .

Abstract

We show that wetting properties crucially control the patterns in two-phase flows of immiscible fluids in microchannels. Ordered patterns, continuously entrained by the flow, are obtained when one phase completely wets the walls, while disordered patterns, intermittently adhering to the channel walls, are unavoidably produced when wetting is partial. A lower limit for the channel sizes capable of generating well structured objects (drops, pears, pearl necklaces, ...) is presented.

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