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알루미늄 평판 및 50 ㎛ 간격 격자 표면에 대한 에탄올 액적 충돌 거동 가시화
강동국,권대희,천두만,염은섭,Kang, Dongkuk,Kwon, Daehee,Chun, Doo-Man,Yeom, Eunseop 한국가시화정보학회 2020 한국가시화정보학회지 Vol.18 No.1
The droplet impact behavior is dominated by some parameters such as surface temperature, We number, surface and fluid property. Especially, Leidenfrost effect which prevents the contact between surface and droplet is very powerful phenomenon for determining droplet impact behavior. Due to this effect, the impact regime is divided into contact boiling regime and film boiling regime whether the droplet contact with the surface. Many studies have found that surface micro-structures which processed by surface processing are effective to overcome the Leidenfrost effect. In this study, droplet impact behaviors were compared using ethanol both on flat and laser-ablated Al surface. On the flat surface, impact regime was mainly divided by surface temperature. And there is key dominant parameter for each regime. On the laser-ablated surface, we could see changed impact regime and different impact behavior such as jetting and ejection of tiny droplets despite of same impact conditions.
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