Analysis of deformation dynamics of droplet in oil under the CPG electric field

Peng, Ye; Liao, Zhixiang; Zhang, Youyu; Fang, Yuan; Qiu, Zhi; Yu, Bao; Gong, Haifeng

doi:10.1016/j.cherd.2022.05.024

Cited by 9 publications

(1 citation statement)

References 33 publications

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“…Microdroplets, the scale-down analytical platforms, are commonly used in the fields of analytical chemistry [ 1 ], biology [ 2 ], material synthesis [ 3 ], and so on. Understanding the impacting mechanism between a liquid-in-air droplet and an immiscible aqueous solution is important and helpful for lots of applications, such as biofabrication through inkjet printing [ 4 , 5 ] and droplet encapsulation [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ] for drug delivery [ 14 , 15 ], PCR reaction [ 16 , 17 ], and preparation of Janus droplets [ 18 ] or double-emulsions [ 19 , 20 ]. When the oil droplet impacts with another immiscible aqueous solution, it will transiently knock a crater on the surface of the aqueous solution and lead to the floating, bouncing, jetting, or splashing of the solution [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Droplet Impacting on an Immiscible Liquid via Three-Phase Field Method

et al. 2023

Micromachines

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In this work, we establish a two-dimensional axisymmetric simulation model to numerically study the impacting behaviors between oil droplets and an immiscible aqueous solution based on the three-phase field method. The numerical model is established by using the commercial software of COMSOL Multiphysics first and then validated by comparing the numerical results with the previous experimental study. The simulation results show that under the impact of oil droplets, a crater will form on the surface of the aqueous solution, which firstly expands and then collapses with the transfer and dissipation of kinetic energy of this three-phase system. As for the droplet, it flattens, spreads, stretches, or immerses on the crater surface and finally achieves an equilibrium state at the gas–liquid interface after experiencing several sinking-bouncing circles. The impacting velocity, fluid density, viscosity, interfacial tension, droplet size, and the property of non-Newtonian fluids all play important roles in the impact between oil droplets and aqueous solution. The conclusions can help to cognize the mechanism of droplet impact on an immiscible fluid and provide useful guidelines for those applications concerning droplet impact.

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