Oscillation and collective conveyance of water-in-oil droplets by microfluidic bolus flow

Takuya Ohmura, Masatoshi Ichikawa, Ken Ichiro Kamei, Yusuke T. Maeda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Microfluidic techniques have been extensively developed to realize micro-total analysis systems in a small chip. For microanalysis, electro-magnetic forces have generally been utilized for the trapping of objects, but hydrodynamics has been little explored despite its relevance to pattern formation. Here, we report that water-in-oil (W/O) droplets can be transported in the grid of an array of other large W/O droplets. As each droplet approaches an interspace of the large droplet array, while exhibiting persistent back-and-forth motion, it is conveyed at a velocity equal to the droplet array. We confirm the appearance of closed streamlines in a numerical simulation, suggesting that a vortex-like stream is involved in trapping the droplet. Furthermore, more than one droplet is also conveyed as an ordered cluster with dynamic reposition.

Original languageEnglish
Article number074102
JournalApplied Physics Letters
Volume107
Issue number7
DOIs
Publication statusPublished - Aug 17 2015
Externally publishedYes

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oils
oscillations
trapping
water
systems analysis
microanalysis
chips
hydrodynamics
grids
vortices
simulation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Oscillation and collective conveyance of water-in-oil droplets by microfluidic bolus flow. / Ohmura, Takuya; Ichikawa, Masatoshi; Kamei, Ken Ichiro; Maeda, Yusuke T.

In: Applied Physics Letters, Vol. 107, No. 7, 074102, 17.08.2015.

Research output: Contribution to journalArticle

Ohmura, Takuya ; Ichikawa, Masatoshi ; Kamei, Ken Ichiro ; Maeda, Yusuke T. / Oscillation and collective conveyance of water-in-oil droplets by microfluidic bolus flow. In: Applied Physics Letters. 2015 ; Vol. 107, No. 7.
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