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Updated: Nov 3, 2025
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Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
Published on: June 14, 2019
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Lateral Drop Rebound on a Hydrophobic and Chemically Heterogeneous Surface
Tingting Ji1,2, Yongcai Pan1,2, Yufu Shao1,2
1Guangxi Key Lab of Multi-Source Information Mining & Security, Guangxi Normal University, Guilin 541004, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 1, 2021
Summary
Understanding drop rebound on hydrophobic surfaces is key. This study reveals that surface heterogeneity causes lateral, asymmetrical bounces, offering control over drop behavior.
Area of Science:
- Fluid dynamics
- Surface science
- Computational physics
Background:
- Drop impact dynamics are crucial in various applications.
- Surface properties significantly influence liquid behavior.
- Chemical heterogeneity introduces complex interactions.
Purpose of the Study:
- Investigate drop rebound on hydrophobic and chemically heterogeneous surfaces.
- Analyze the effect of surface hydrophobicity and heterogeneity on drop bounce.
- Develop a predictive understanding of drop behavior on complex surfaces.
Main Methods:
- Multiphase lattice Boltzmann method simulation.
- Analysis of drop-surface interactions and contact line dynamics.
- Phase diagram construction for various surface conditions.
Main Results:
- Vertical rebound on homogeneous surfaces, increasing with hydrophobicity.
- Lateral rebound towards the lower hydrophobic side on heterogeneous surfaces.
- Unbalanced Young's force drives asymmetrical rebound.
Conclusions:
- Surface heterogeneity dictates lateral drop rebound direction.
- Contact angle provides a basis for predicting rebound height and flight time.
- Provides strategies for controlling rebound behavior using surface design.
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