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Title: Filtering microfluidic bubble trains at a symmetric junction
Authors: Parthiban, P.
Khan, S.A. 
Issue Date: 7-Feb-2012
Citation: Parthiban, P., Khan, S.A. (2012-02-07). Filtering microfluidic bubble trains at a symmetric junction. Lab on a Chip - Miniaturisation for Chemistry and Biology 12 (3) : 582-588. ScholarBank@NUS Repository.
Abstract: We report how a nominally symmetric microfluidic junction can be used to sort all bubbles of an incoming train exclusively into one of its arms. The existence of this "filter" regime is unexpected, given that the junction is symmetric. We analyze this behavior by quantifying how bubbles modulate the hydrodynamic resistance in microchannels and show how speeding up a bubble train whilst preserving its spatial periodicity can lead to filtering at a nominally symmetric junction. We further show how such an asymmetric traffic of bubble trains can be triggered in symmetric geometries by identifying conditions wherein the resistance to flow decreases with an increase in the number of bubbles in the microchannel and derive an exact criterion to predict the same. © 2012 The Royal Society of Chemistry.
Source Title: Lab on a Chip - Miniaturisation for Chemistry and Biology
ISSN: 14730197
DOI: 10.1039/c1lc20639g
Appears in Collections:Staff Publications

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