Coalescence-induced propulsion of droplets on a superhydrophilic wire

Youhua Jiang; Leyun Feng; Allison O'Donnell; Christian MacHado; Wonjae Choi; Neelesh A. Patankar; Kyoo Chul Park

doi:10.1063/5.0124560

Coalescence-induced propulsion of droplets on a superhydrophilic wire

Youhua Jiang, Leyun Feng, Allison O'Donnell, Christian MacHado, Wonjae Choi, Neelesh A. Patankar, Kyoo Chul Park^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Droplet transport on a cylindrical wire has applications in numerous fields such as fog collection, mist elimination, filtration, and oil/water separation. This work reports a droplet transport phenomenon on a superhydrophilic wire that shows a transient velocity powered not by the gradient of substrate geometry or wettability but primarily by the surface-to-kinetic energy transition that occurs along the axial direction upon coalescence. The transition efficiency is mainly limited by the viscous friction at the local liquid wedge, a relationship that a modified Ohnesorge number can capture.

Original language	English
Article number	231602
Journal	Applied Physics Letters
Volume	121
Issue number	23
DOIs	https://doi.org/10.1063/5.0124560
State	Published - 5 Dec 2022
Externally published	Yes

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10.1063/5.0124560

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abstract = "Droplet transport on a cylindrical wire has applications in numerous fields such as fog collection, mist elimination, filtration, and oil/water separation. This work reports a droplet transport phenomenon on a superhydrophilic wire that shows a transient velocity powered not by the gradient of substrate geometry or wettability but primarily by the surface-to-kinetic energy transition that occurs along the axial direction upon coalescence. The transition efficiency is mainly limited by the viscous friction at the local liquid wedge, a relationship that a modified Ohnesorge number can capture.",

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AU - MacHado, Christian

AU - Choi, Wonjae

AU - Patankar, Neelesh A.

AU - Park, Kyoo Chul

PY - 2022/12/5

Y1 - 2022/12/5

N2 - Droplet transport on a cylindrical wire has applications in numerous fields such as fog collection, mist elimination, filtration, and oil/water separation. This work reports a droplet transport phenomenon on a superhydrophilic wire that shows a transient velocity powered not by the gradient of substrate geometry or wettability but primarily by the surface-to-kinetic energy transition that occurs along the axial direction upon coalescence. The transition efficiency is mainly limited by the viscous friction at the local liquid wedge, a relationship that a modified Ohnesorge number can capture.

AB - Droplet transport on a cylindrical wire has applications in numerous fields such as fog collection, mist elimination, filtration, and oil/water separation. This work reports a droplet transport phenomenon on a superhydrophilic wire that shows a transient velocity powered not by the gradient of substrate geometry or wettability but primarily by the surface-to-kinetic energy transition that occurs along the axial direction upon coalescence. The transition efficiency is mainly limited by the viscous friction at the local liquid wedge, a relationship that a modified Ohnesorge number can capture.

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JO - Applied Physics Letters

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Coalescence-induced propulsion of droplets on a superhydrophilic wire

Abstract

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