Journal
PHYSICS OF FLUIDS
Volume 21, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3123533
Keywords
bubbles; gases; liquids; microfluidics; swirling flow; two-phase flow
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Funding
- Andalusian Government [DPI2007-63559]
- Ministry of Science and Education (Spain)
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A volume-of-fluid numerical method is used to predict the dynamics of microbubble formation in an axisymmetric flow-focusing microfluidic device for a gas-liquid system. Numerical results show that, in all the cases analyzed, the introduction of swirl into the focusing liquid stabilizes the tapering gas-liquid meniscus from which a steady gas ligament issues. Consequently, a drastic reduction in the size of bubbles generated by the device is achieved under similar gas and liquid flow rates.
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