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Slippage on a particle-laden liquid-gas interface in textured microchannels

Authors :
Suhas S. Joshi
Mark C. Thompson
Amit Agrawal
Anvesh Gaddam
Source :
Physics of Fluids. 30:032101
Publication Year :
2018
Publisher :
AIP Publishing, 2018.

Abstract

Despite numerous investigations in the literature on slip flows in textured microchannels, experimental results were seldom in agreement with the theory. It is conjectured that contamination of the liquid-gas interface by impurities might be one of the sources of this discrepancy. However, the effect of impurities on slippage at the liquid-gas interface is neither understood nor previously reported. To this end, this work presents numerical investigation on the flow past a liquid-gas interface embedded with solid particles in textured microchannels. Initially, we present numerical simulations past transverse ribs with cylindrical particles on the liquid-gas interface. A reduction in effective slip length (or slip loss) with respect to the particle-free interface as a function of gas fraction, constriction ratio, and particle position was quantified. A significant slip loss (∼20-80%) was induced, owing to acceleration-deceleration cycles experienced by the liquid advecting across the particle-laden liquid-...

Details

ISSN :
10897666 and 10706631
Volume :
30
Database :
OpenAIRE
Journal :
Physics of Fluids
Accession number :
edsair.doi...........6dbf1fdf4497f00e06eefd09f7a0b531
Full Text :
https://doi.org/10.1063/1.5017011