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Numerical Calculation Method of Apparent Contact Angles on Heterogeneous Double-Roughness Surfaces
Jian Dong1, Yanli Jin1, He Dong1
1Key Laboratory of E&M, Zhejiang University of Technology, Ministry of Education & Zhejiang Province , Hangzhou, 310014, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|September 9, 2017
Summary
This study introduces a new numerical method to calculate apparent contact angles (ACAs) on heterogeneous double-roughness surfaces. This approach enhances superhydrophobic surface design for applications like self-cleaning and anti-icing technologies.
Area of Science:
- Surface Science and Engineering
- Materials Science
- Fluid Dynamics
Background:
- Lotus surfaces exhibit superhydrophobicity due to double-roughness structures.
- Previous models by Herminghaus and Patankar calculated apparent contact angles (ACAs) for homogeneous double-roughness surfaces.
- Homogeneous surfaces utilize identical wettable materials for both dual-scale structures and bases.
Purpose of the Study:
- To propose a numerical calculation method for ACAs on heterogeneous double-roughness surfaces.
- To address surfaces where dual-scale structures and bases are made of different wettable materials.
- To enhance existing models for apparent contact angle calculations.
Main Methods:
- Development of a numerical calculation method for ACAs.
- Enhancement of the Herminghaus approach for heterogeneous surfaces.
- Application of the pillar model concept to dissimilar material interfaces.
Main Results:
- Successfully calculated ACAs on heterogeneous double-roughness surfaces.
- Demonstrated an enhanced numerical approach compared to previous methods.
- Validated the method's applicability to surfaces with varying material wettability.
Conclusions:
- The proposed numerical method offers a novel design approach for heterogeneous superhydrophobic surfaces.
- This method is promising for advanced applications requiring tailored surface wettability.
- Potential applications include self-cleaning, anti-icing, antifogging, and enhanced condensation heat transfer.
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