Visualization Study of Droplet Impact Phenomena on Micro-, Micro/Nano-Textured Surfaces and Lubricant Infused Surfaces
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초록
In this study, visualization of droplet impact on hydrophobic micro-, micro/nano-textured surfaces and lubricant infused surfaces was performed. Experimental specimens were fabricated using MEMS (micro- electromechanical systems) techniques and droplet impact with pure water was visualized at various Weber number range (2 < We < 200) using a high speed camera at 8000 frames per second. Through this study it was confirmed that, various droplet impact behaviors were appeared as the Weber number was increased and the Weber number at which droplet impact behavior changes was affected by surface characteristics. Particularly, on the lubricant infused surface (LIS) after droplet impact retraction velocity is reduced by the lubricant viscosity effect during contraction process of droplet to improve the droplet deposition behavior on the surface. It was confirmed that droplet break up phenomena caused interfacial instability was slightly delayed on LIS due to the viscous dissipation effect during droplet impact process.
Abstract
In this study, visualization of droplet impact on hydrophobic micro-, micro/nano-textured surfaces and lubricant infused surfaces was performed. Experimental specimens were fabricated using MEMS (micro- electromechanical systems) techniques and droplet impact with pure water was visualized at various Weber number range (2 < We < 200) using a high speed camera at 8000 frames per second. Through this study it was confirmed that, various droplet impact behaviors were appeared as the Weber number was increased and the Weber number at which droplet impact behavior changes was affected by surface characteristics. Particularly, on the lubricant infused surface (LIS) after droplet impact retraction velocity is reduced by the lubricant viscosity effect during contraction process of droplet to improve the droplet deposition behavior on the surface. It was confirmed that droplet break up phenomena caused interfacial instability was slightly delayed on LIS due to the viscous dissipation effect during droplet impact process.
참고문헌 (14)
- R. Rioboo, "Outcomes from a drop impact on solid surfaces", Atomization and Sprays, 11, pp.155~165 (2001)
- A. L. Yarin, "Drop impact dynamics : Splashing, Spreading, Receding, Bouncing", Annual Review of Fluid Mechanics, 38, pp.159~192 (2006)
- C. Josserand, "Drop impact on solid surface", Annual Review of Fluid Mechanics, 48, pp.365~391 (2016)
- H. Kim, "Drop impact characteristics and structure effects of hydrophobic surfaces with micro-and", or nanoscaled structures, 2012, pp.28, 11250~11257
- H.PengFei, "Water droplet impact on superhydrophobic surfaces with microstructure and hierarchial roughness", Science China Physics, Mechanics and Astronomy (2014)
- N. D. Patil, "Droplet impact dynamics on micropillared hydrophobic surfaces", Experimental Thermal and Fluid Science, 74, pp.195~206 (2016)
- D. D. Bartolo, "Bouncing or sticky droplets : Impalement transitions on superhydrophobic micropatterned surfaces", Euroohysics Letters, 74(2), pp.299~305 (2006)
- M. Reyssat, "Bouncing transitions on microtextured materials", Europhysics Letters, 74(2), pp.306~312 (2006)
- J. Li, "Slippery Lubricant-Infused Surfaces : Properties and Emerging Applications", Advanced Functional Materials, 29, pp.1802317~ (2019)
- C. Lee, "Drop impact dynamics on oil-Infused nanostructured surfaces", Langmuir, 30, pp.8400~8407 (2014)
- 김설하, "Droplet impacting dynamics on wettable, rough and slippery oil-infuse surfaces", Journal of Mechanical Science and Technology, 34(1), pp.219~228 (2020), 대한기계학회
- D. I. Yu, "Wetting criteria of intrinsic contact angle to distinguish between hydrophilic and hydrophobic micro-", nanotextured surfaces : Experimental and theoretical analysis with synchrotron X-ray imaging, 2019, pp.35, 3607~3614
- T. Deng, "Non wetting of impinging droplets on textured surfaces", Applied Physics Letters, 94, pp.133109~ (2009)
- D. Bartolo, "Singular jets and bubbles in drop impact", Physical Review Letters, 96, pp.124501~ (2006)