Numerical study of droplet impact on superhydrophobic vibrating surfaces with microstructures

Dai, Xingbo; Zhang, Wenqiang; Zhang, Jingzhi; Xin, Gongming; Wang, Xinyu

doi:10.1016/j.csite.2021.101732

Cited by 3 publications

(3 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The different frequency vibrations that occur on droplets and surfaces can also cause significant changes in the penetration and stretching behavior of droplets. 40,41 To better understand the situation, this study focuses on the dynamic behavior of a viscous droplet impacting a flexible mesh surface with a fixed end by changing the impact position and We number in this work. The spreading characteristics and the ligament behavior of the droplet during the impact process are analyzed and the relationship between the ligament length and surface vibration is discussed.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In addition to considering the inherent properties of the surface and droplet, the presence of vibrations in flexible surfaces introduces a significant level of complexity to the dynamic behavior of droplet impact. − The change of droplet behavior is intricately influenced by surface bending and vibration, thereby converting the kinetic energy of droplet impact into surface vibration energy. Upon impact, the flexible surface undergoes vibrations at a specific frequency and amplitude. − Due to the energy loss caused by vibration, surface energy can be transferred and dissipated, which in turn affects the dynamic behavior after impact.…”

Section: Introductionmentioning

confidence: 99%

“…Upon impact, the flexible surface undergoes vibrations at a specific frequency and amplitude. − Due to the energy loss caused by vibration, surface energy can be transferred and dissipated, which in turn affects the dynamic behavior after impact. The different frequency vibrations that occur on droplets and surfaces can also cause significant changes in the penetration and stretching behavior of droplets. , …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Behavior of Viscous Droplets Impact on a Flexible Mesh Surface

Gu,

Jia,

Zhou

et al. 2024

Langmuir

View full text Add to dashboard Cite

The dynamic behavior of a viscous droplet impacting a flexible mesh surface with a fixed end is studied by high-speed photography in this work. Our experimental results reveal that surface vibration occurs when the viscous droplet impacts the flexible mesh surface. Simultaneously, the droplet spreads on the upper surface and penetrates into the mesh surface, resulting in a decrease in the spreading diameter on the upper surface. On the lower surface, the droplet elongates and forms multiple ligaments. Notably, different dynamic behaviors are observed when the droplet impacts surfaces with varying Weber (We) numbers due to viscous dissipation and surface vibration. However, as the impact position deviates from the fixed end, the surface vibrational amplitude increases, leading to a decreased diffusion range of the droplet on the lower surface. In addition, the vibration amplitude significantly enhances with increase of the We number. The vibration induces stretching and eventual rupture of the cardinal ligament under specific conditions. The first breaking time of the cardinal ligament delays with the decrease of the We number. As the impact position moves away from the fixed end, this situation is enhanced. Especially, when the stretching direction of the ligament is inconsistent with the vibration direction of the surface, the vibration has a great influence on the stretching behavior of the cardinal ligament.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Behavior of Viscous Droplets Impact on a Flexible Mesh Surface

Gu,

Jia,

Zhou

et al. 2024

Langmuir

View full text Add to dashboard Cite

show abstract

Experimentally validated phase-field model to design the wettability of micro-structured surfaces

et al. 2023

View full text Add to dashboard Cite

Experimental study of dynamic behavior of impacting droplets on vibrating super-hydrophobic surfaces

Xing,

Zhang,

Jiang

et al. 2024

Physics of Fluids

View full text Add to dashboard Cite

The dynamic behaviors of droplets impacting on a vibrating solid surface are complex and interesting, as the differences in the initial phase angle can result in various droplet behaviors. The dynamic behavior of free-falling droplets impacting vibrating superhydrophobic substrates was investigated via high-speed photography. The effects of the initial phase angle (φ), Weber number (We), and vibration frequency (f) on the morphology evolution and energy dissipation were analyzed. Herein, 12 initial phase angles were selected as variables to investigate the evolution of droplet morphology with various initial phase angles. The effect of different initial phase angles on the maximum spreading diameter of droplets can cause variations of over 10%. The initial phase angles enhancing or restricting the droplet spreading were quantitatively defined. The Weber number and initial phase angle which can produce daughter droplets are obtained quantitatively. Meanwhile, a correlation between dimensionless spreading coefficient and dimensionless time was established for various vibration frequencies (f), revealing the effects of f on the maximum spreading diameter of droplet. Furthermore, a mathematical relationship for predicting the maximum spreading diameter of droplet impacting on a vibrating substrate was established based on the derivation of energy conservation. The error of the prediction mathematical model was proved to be less than 2% by the experimental results. These results provide fundamental understanding of droplet impacting on a vibration wall and could be useful for related engineering applications.

show abstract

Numerical study of droplet impact on superhydrophobic vibrating surfaces with microstructures

Cited by 3 publications

References 49 publications

Dynamic Behavior of Viscous Droplets Impact on a Flexible Mesh Surface

Dynamic Behavior of Viscous Droplets Impact on a Flexible Mesh Surface

Experimentally validated phase-field model to design the wettability of micro-structured surfaces

Experimental study of dynamic behavior of impacting droplets on vibrating super-hydrophobic surfaces

Contact Info

Product

Resources

About