이중으로 텍스쳐 된 표면에 충돌하는 액적의 동적 특성Dynamic Characteristics of Droplet Impinging on Multi-layer Texture Surfaces
- Authors
- 문주현; 이성혁
- Issue Date
- 2016
- Publisher
- 한국액체미립화학회
- Keywords
- Anodization; Droplet; Impinging; Hydrophilic; Hydrophobic; 양극 산화법; 액적; 충돌; 친수성소수성
- Citation
- 한국액체미립화 학회지, v.21, no.1, pp 58 - 63
- Pages
- 6
- Journal Title
- 한국액체미립화 학회지
- Volume
- 21
- Number
- 1
- Start Page
- 58
- End Page
- 63
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/8401
- ISSN
- 1226-2277
- Abstract
- This study presents the dynamic characteristics of an impinging droplet on hydrophobic and hydrophilic surfaces with various texture area fractions. The flat surface was fabricated by using the drilling technique to make micro-meter hole-patterned surfaces, which shows hydrophobic textured surfaces. Moreover, the hydrophilic textured surfaces were manufactured by anodizing technique on the micro-meter hole-patterned surfaces to generate multi-layer surfaces. Impinging droplet experiments were conducted for various hole-patterned surfaces, with changing impact velocity and texture area fractions. It is observed that an anodizing technique increases wettability by decrease in hole diameter on the textured surfaces. However, micro-drilled surfaces decreases wettability because the hole diameter was so large that air can be trapped under the holes.
In addition, the maximum spreading diameter decreases with the texture area fraction for the micro-drilled surfaces because of decrease in wettability.
This study presents the dynamic characteristics of an impinging droplet on hydrophobic and hydrophilic surfaces with various texture area fractions. The flat surface was fabricated by using the drilling technique to make micro-meter hole-patterned surfaces, which shows hydrophobic textured surfaces. Moreover, the hydrophilic textured surfaces were manufactured by anodizing technique on the micro-meter hole-patterned surfaces to generate multi-layer surfaces. Impinging droplet experiments were conducted for various hole-patterned surfaces, with changing impact velocity and texture area fractions. It is observed that an anodizing technique increases wettability by decrease in hole diameter on the textured surfaces. However, micro-drilled surfaces decreases wettability because the hole diameter was so large that air can be trapped under the holes.
In addition, the maximum spreading diameter decreases with the texture area fraction for the micro-drilled surfaces because of decrease in wettability.
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