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Wettability of semispherical droplets on layered elastic gradient soft substrates
Yonglin Yang1, Xing Li2, Wenshuai Wang3
1School of Mathematics and Statistics, Ningxia University, Yinchuan, 750021, China. yang_yongl@yeah.net.
Scientific Reports
|January 27, 2021
Summary
This study investigates droplet wettability on layered soft substrates, crucial for understanding natural phenomena and resource recovery. Findings reveal how substrate properties influence droplet behavior and deformation.
Area of Science:
- Soft matter physics
- Surface science
- Materials science
Background:
- Wettability of soft matter is critical in frontier research.
- Droplet wetting on soft substrates is a key area of study.
- Stratified structures are common in nature, impacting phenomena like oil and gas recovery.
Purpose of the Study:
- To investigate the wettability of droplets on layered elastic gradient soft substrates.
- To analyze the influence of capillary force, elastic force, and surface tension on wetting behavior.
- To understand the deformation characteristics of layered soft substrates under droplet impact.
Main Methods:
- Derivation of the constitutive equation for the substrate using a vector function system in cylindrical coordinates.
- Obtaining the transfer relation for layered structures.
- Utilizing double Bessel function integrals to derive expressions for displacement and stress.
- Employing numerical formulas for double Bessel function integrals to compute results.
Main Results:
- Substrate deformation decreases as elastic modulus increases.
- Displacement and stress exhibit significant changes near the contact line.
- Variations in displacement and stress become less pronounced far from the droplet's contact radius.
Conclusions:
- The study provides insights into the complex wettability phenomena on layered soft substrates.
- Understanding these principles is vital for applications in natural resource extraction and materials science.
- The findings contribute to the fundamental knowledge of droplet-substrate interactions in stratified systems.
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