Dynamics of Ferrofluid Droplet Impact on Slippery Liquid-Infused Porous Surfaces

Xuan Liu; Yuhang Dai; Haibo Zhao; Cheng Li; Peng Yu

doi:10.1021/acs.langmuir.5c00814

Dynamics of Ferrofluid Droplet Impact on Slippery Liquid-Infused Porous Surfaces

Xuan Liu (Co-first Author)
, Yuhang Dai (Co-first Author)
, Haibo Zhao
, Cheng Li^*
, Peng Yu^*

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

3 Citations (Scopus)

Abstract

In this study, the impact of ferrofluid droplets on slippery liquid-infused porous surfaces (SLIPS) is explored. A model is proposed to take account of the reduction in the initial volume of the ferrofluid droplet caused by the nonuniform external magnetic field. Five modes are identified based on the distinctive postimpact characteristics, and the corresponding phase diagram is summarized. In the low Weber number range (We ≤ 50), the low energy dissipation caused by the low friction characteristics of the SLIPS, combined with the suppression effect of magnetic field on the lateral expansion of the droplet, accumulates the kinetic energy in the vertical direction. Consequently, the bounce height of the ferrofluid droplet on the SLIPS increases with We, which is contrary to that for the superhydrophobic surfaces. The results offer deeper insights into the magnetic controlled droplet rebound and the impact dynamics across diverse surface types. © 2025 American Chemical Society.

Original language	English
Pages (from-to)	14807–14816
Journal	Langmuir
Volume	41
Issue number	23
Online published	7 May 2025
DOIs	https://doi.org/10.1021/acs.langmuir.5c00814
Publication status	Published - 17 Jun 2025

Funding

The author P.Y. would like to thank the finance supports from the Natural Science Foundation of Guangdong (Grant No. 2024A1515011811), the Department of Science and Technology of Guangdong Province (Grant No. 2023B1212060001), Shenzhen Science and Technology Innovation Commission (Grant No. JSGG20220831101400002), and the Shenzhen Key Laboratory of Complex Aerospace Flows (Grant No. ZDSYS201802081843517).

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title = "Dynamics of Ferrofluid Droplet Impact on Slippery Liquid-Infused Porous Surfaces",

abstract = "In this study, the impact of ferrofluid droplets on slippery liquid-infused porous surfaces (SLIPS) is explored. A model is proposed to take account of the reduction in the initial volume of the ferrofluid droplet caused by the nonuniform external magnetic field. Five modes are identified based on the distinctive postimpact characteristics, and the corresponding phase diagram is summarized. In the low Weber number range (We ≤ 50), the low energy dissipation caused by the low friction characteristics of the SLIPS, combined with the suppression effect of magnetic field on the lateral expansion of the droplet, accumulates the kinetic energy in the vertical direction. Consequently, the bounce height of the ferrofluid droplet on the SLIPS increases with We, which is contrary to that for the superhydrophobic surfaces. The results offer deeper insights into the magnetic controlled droplet rebound and the impact dynamics across diverse surface types. {\textcopyright} 2025 American Chemical Society.",

author = "Xuan Liu and Yuhang Dai and Haibo Zhao and Cheng Li and Peng Yu",

year = "2025",

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doi = "10.1021/acs.langmuir.5c00814",

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TY - JOUR

T1 - Dynamics of Ferrofluid Droplet Impact on Slippery Liquid-Infused Porous Surfaces

AU - Liu, Xuan

AU - Dai, Yuhang

AU - Zhao, Haibo

AU - Li, Cheng

AU - Yu, Peng

PY - 2025/6/17

Y1 - 2025/6/17

N2 - In this study, the impact of ferrofluid droplets on slippery liquid-infused porous surfaces (SLIPS) is explored. A model is proposed to take account of the reduction in the initial volume of the ferrofluid droplet caused by the nonuniform external magnetic field. Five modes are identified based on the distinctive postimpact characteristics, and the corresponding phase diagram is summarized. In the low Weber number range (We ≤ 50), the low energy dissipation caused by the low friction characteristics of the SLIPS, combined with the suppression effect of magnetic field on the lateral expansion of the droplet, accumulates the kinetic energy in the vertical direction. Consequently, the bounce height of the ferrofluid droplet on the SLIPS increases with We, which is contrary to that for the superhydrophobic surfaces. The results offer deeper insights into the magnetic controlled droplet rebound and the impact dynamics across diverse surface types. © 2025 American Chemical Society.

AB - In this study, the impact of ferrofluid droplets on slippery liquid-infused porous surfaces (SLIPS) is explored. A model is proposed to take account of the reduction in the initial volume of the ferrofluid droplet caused by the nonuniform external magnetic field. Five modes are identified based on the distinctive postimpact characteristics, and the corresponding phase diagram is summarized. In the low Weber number range (We ≤ 50), the low energy dissipation caused by the low friction characteristics of the SLIPS, combined with the suppression effect of magnetic field on the lateral expansion of the droplet, accumulates the kinetic energy in the vertical direction. Consequently, the bounce height of the ferrofluid droplet on the SLIPS increases with We, which is contrary to that for the superhydrophobic surfaces. The results offer deeper insights into the magnetic controlled droplet rebound and the impact dynamics across diverse surface types. © 2025 American Chemical Society.

UR - https://www.scopus.com/pages/publications/105004443030

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105004443030&origin=recordpage

U2 - 10.1021/acs.langmuir.5c00814

DO - 10.1021/acs.langmuir.5c00814

M3 - RGC 21 - Publication in refereed journal

SN - 0743-7463

VL - 41

SP - 14807

EP - 14816

JO - Langmuir

JF - Langmuir

IS - 23

ER -

Dynamics of Ferrofluid Droplet Impact on Slippery Liquid-Infused Porous Surfaces

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