The Proceedings of the Fluids engineering conference
Online ISSN : 2424-2896
2009
Session ID : 1508
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1508 Formation of intermediate state between microdroplets and laminar flows in hydrophilic microchannels
Kyosuke SHINOHARAYuto YOKOYAMAToru TORIIKoji OKAMOTO
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
The intermediate state between microdroplets and microfluidics in two immiscible fluids is described. It was found that Y-shaped two-phase flow is formed with a stable liquid/liquid interface at a cross junction in a hydrophilic microchannel. A velocity vector map, obtained by microparticle image velocimetry, reveals the Y-shaped flow consists of aqueous phase flow along the edge of the channel and an acrylate monomer phase flow penetrating the center of the channel. The transition from the Y-shaped flow of other flow patterns can be characterized by a state diagram that depends on the capillary number and the Weber number of each injecting phase.
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© 2009 The Japan Society of Mechanical Engineers
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