@Article{CiCP-9-5,
author = {},
title = {Lattice Boltzmann Simulation of Droplet Generation in a Microfluidic Cross-Junction},
journal = {Communications in Computational Physics},
year = {2011},
volume = {9},
number = {5},
pages = {1235--1256},
abstract = {<p style="text-align: justify;">Using the lattice Boltzmann multiphase model, numerical simulations have
been performed to understand the dynamics of droplet formation in a microfluidic
cross-junction. The influence of capillary number, flow rate ratio, viscosity ratio, and
viscosity of the continuous phase on droplet formation has been systematically studied
over a wide range of capillary numbers. Two different regimes, namely the squeezing-like
regime and the dripping regime, are clearly identified with the transition occurring
at a critical capillary number Ca<sub>cr</sub>. Generally, large flow rate ratio is expected to
produce big droplets, while increasing capillary number will reduce droplet size. In
the squeezing-like regime (Ca ≤ Ca<sub>cr</sub>), droplet breakup process is dominated by the
squeezing pressure and the viscous force; while in the dripping regime (Ca &gt; Ca<sub>cr)</sub>,
the viscous force is dominant and the droplet size becomes independent of the flow
rate ratio as the capillary number increases. In addition, the droplet size weakly depends
on the viscosity ratio in both regimes and decreases when the viscosity of the
continuous phase increases. Finally, a scaling law is established to predict the droplet
size.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.231009.101110s},
url = {https://global-sci.com/article/80898/lattice-boltzmann-simulation-of-droplet-generation-in-a-microfluidic-cross-junction}
}