Evaporation of water with an extremely small contact angle on a solid substrate: from a puddle to a small drop = 고체 기판 위에서 매우 작은 접촉각을 갖는 거대 물방울부터 작은 물방울까지의 증발

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Evaporation is a common phenomenon in everyday life. However, most previous studies have focused on the evaporation of a small sessile drop, and a systematic approach to the evaporation rate of a large drop is insufficient. The shape of a drop is determined by the relative effect of gravity and surface tension, and the two relative forces are represented by the dimensionless number Bo. Previous studies noted that when a small droplet evaporates, diffusion dominates and the evaporation rate is proportional to the radius of the droplet. On the contrary, for the large drop evaporation, convection dominates and the evaporation rate is proportional to the square of the radius of the drop. In this paper, the profile of a water drop on a solid substrate, changing from a puddle to a small droplet is calculated by solving the Young-Laplace equation and related ordinary differential equations (ODEs) through Mathematica. We also provide the water drop evaporation experiment data done on a scale to track the evaporation rate, and the shape of the drop monitored by a video camera. We compare the calculated data and the experimental data and conclude that for the evaporation of a puddle with an extremely small contact angle, the evaporation rate is proportional to the radius of the drop not to the square of the radius of the drop.
Advisors
Choi, Siyoungresearcher최시영researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2019.2,[iii, 40 p. :]

Keywords

Evaporation▼apuddle; bond number▼ayoung-laplace equation▼acontact angle▼adrop shape; 증발▼a퍼들▼a본드 수▼a영-라플라스 식▼a접촉각▼a방울 모양

URI
http://hdl.handle.net/10203/266401
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843218&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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