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Viscoelastic multicomponent fluids in confined flow-focusing devices
, M. Sbragaglia, E. Foard, F. Bonaccorso
Published in American Institute of Physics Inc.
2015
Volume: 1648
   
Abstract
The effects of elasticity on the break-up of liquid threads in microfluidic cross-junctions is investigated using numerical simulations based on the "lattice Boltzmann models" (LBM). Working at small Capillary numbers, we investigate the effects of non-Newtonian phases in the transition from droplet formation at the cross-junction (DCJ) and droplet formation downstream of the cross-junction (DC) (Liu & Zhang, Phys. Fluids. 23, 082101 (2011)). Viscoelasticity is found to influence the break-up point of the threads, which moves closer to the cross-junction and stabilizes. This is attributed to an increase of the polymer feedback stress forming in the corner flows, where the side channels of the device meet the main channel. © 2015 AIP Publishing LLC.
About the journal
JournalAIP Conference Proceedings
PublisherAmerican Institute of Physics Inc.
ISSN0094243X