- 고온 열판에 충돌하는 액적의 거동에 대한 유동가시화 연구
- ㆍ 저자명
- 김동연,이승재,김경천,Kim. Dong-Yeon,Yi. Seung-Jae,Kim. Kyung-Chun
- ㆍ 간행물명
- 한국가시화정보학회지= Journal of the Korean society of visualization
- ㆍ 권/호정보
- 2012년|10권 1호|pp.21-26 (6 pages)
- ㆍ 발행정보
- 한국가시화정보학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Hydrophobic characteristics of high temperature metal surface were investigated by high-speed visualization of water droplet impact. An aluminum plate was used as the sample plate and the initial diameter of a water droplet was 2 mm. Transient behavior of a single droplet impinging on the surface with and without heating was captured by using a high speed camera running at 4,000 frames per second. The Leidenfrost phenomenon was demonstrated for the case of $300^{circ}C$ surface temperature, however there was no rebounding of droplet on the cold plate due to hydrophilic nature. The experimental results show that the shape evolution of a droplet impinging on the surface varies with the Weber number, i.e. the ratio of impact inertia to capillary force. The overall water-repellent characteristics of the heated surface was very similar to that of the super hydrophobic surfaces.