Contactless transport of sessile droplets

Contactless droplet transport has gained intensive attention in recent years. In this study, the motion of a sessile binary droplet or a pure water droplet under the contactless Marangoni effect has been investigated experimentally and theoretically. The concrete form of the driving force originates...

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Bibliographic Details
Published in:Physics of fluids (1994) 2021-11, Vol.33 (11)
Main Authors: Jiang, Zhi Wu, Chen, Rui, Wu, Tao, Ding, Hang, Li, Er Qiang
Format: Article
Language:English
Subjects:
Droplets
Fluid dynamics
Marangoni convection
Perturbation theory
Physics
Water drops
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Summary:Contactless droplet transport has gained intensive attention in recent years. In this study, the motion of a sessile binary droplet or a pure water droplet under the contactless Marangoni effect has been investigated experimentally and theoretically. The concrete form of the driving force originates from the evaporation of a pure liquid “source” droplet was achieved and verified by our experimental data. For a “target” droplet consisting of pure water, we discovered a non-negligible increase in its spreading radius R during motion. Based on the experimental results, we proposed a linear approximation between R and the droplet spacing and successfully introduced its influence on the driving force calculation through the perturbation theory.
ISSN:1070-6631
1089-7666
DOI:10.1063/5.0074123