지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2013.12
- 수록면
- 877 - 880 (4page)
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초록· 키워드
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We report our energy and hydrodynamic analyses of coalescence-induced jumping on superhydrophobic surfaces. A full three-dimensional numerical model is developed using the level contour reconstruction method to investigate complex dynamics of contact lines and interfacial areas during the droplet coalescence on superhydrophobic surface (d ? 30μm and contact angle ? 160˚). The experimental characterization of coalescence-induced jumping is conducted with silanated CuO nanostructured surfaces to support the numerical study. The energy analysis shows that approximately half (40%-60%) of the excess amount of surface energy released during the coalescence is converted to kinetic energy on the superhydrophobic surface before the droplet detachment starts. The hydrodynamic analysis shows that the rapid increase in the kinetic energy at the beginning of the coalescence is initiated from low pressure associated with the high negative curvature of the liquid bridge. It also confirms that the asymmetric nature of the droplet evolution with the superhydrophobic wall generates high pressure at the bottom contact area that provides enough driving force to make the merged droplet jump from the wall. This work clarifies the dynamic mechanisms of selfpropelled jumping droplets and provides the necessary framework to develop the superhydrophobic condenser surfaces for various applications.
목차
Abstract
1. Introduction
2. Experimental Method
3. Numerical Method
4. Results and Discussion
5. Conclusions
References
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