- 소수성 텍스쳐 표면에 충돌한 단일 액적의 퍼짐 및 고착 특성
- ㆍ 저자명
- 이재봉,문주현,이성혁,Lee. Jae-Bong,Moon. Joo-Hyun,Lee. Seong-Hyuk
- ㆍ 간행물명
- 한국액체미립화학회지
- ㆍ 권/호정보
- 2012년|17권 1호|pp.14-19 (6 pages)
- ㆍ 발행정보
- 한국액체미립화학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
The present study conducts experimental investigation on spreading and deposition characteristics of a $4.3{mu}l$ de-ionized (DI) water droplet impacting upon aluminum (Al 6061) flat and textured surfaces. The micro-textured surface consisted the micro-hole arrays (hole diameter: $125{mu}m$, hole depth: $125{mu}m$) fabricated by the conventional micro-computer numerical control (${mu}$-CNC) milling machine process. We examined the surface effect of texture area fraction ${varphi}_s$ ranging from 0 to 0.57 and impact velocity of droplet ranging from 0.40 m/s to 1.45 m/s on spreading and deposition characteristics from captured images. We used a high-speed camera to capture sequential images for investigate spreading characteristics and the image sensor to capture image of final equilibrium deposition droplet for analyze spreading diameter and contact angle. We found that the deposition droplet on textured surfaces have different wetting states. When the impact velocity is low, the non-wetting state partially exists, whereas over 0.64 m/s of impact velocity, totally wetting state is more prominent due to the increase kinetic energy of impinging droplet.