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Evaporation Cooling of Droplet due to Surface Roughness under Radiative Heat Input Condition  

Bang Chang-Hoon (Department of Fire Protection Engineering, Kyungbuk College)
Kwon Jin-Sun (Taesan LCD)
Yea Yong-Taeg (Department of Mechanical Engineering, Gyungil University)
Publication Information
Journal of the Korean Society of Safety / v.19, no.3, 2004 , pp. 14-19 More about this Journal
Abstract
The objective of the present work is to examine evaporation cooling of droplet due to surface roughness under radiative heat input condition. The surface temperatures varied from $80\~160^{\circ}C$ on aluminum alloy (AL 2024) and surface roughness was $0.18{\mu}m,\;1.36{\mu}m$. The results are as follows; Regardless of surface roughness under radiative heat input condition, as droplet diameter is larger, the in-depth temperature of solid decreases and evaporation time increases. In the case of $0.18{\mu}m\;and\;1.36{\mu}m$ of surface roughness, the larger the surface roughness is, the less the evaporation time is and the larger the temperature within the solid is. In the case of $Ra=0.18{\mu}m$ evaporation time and time averaged heat flux for radiative heat input case is shorter than for the conductive case.
Keywords
droplet radiative heat input; surface roughness; evaporation cooling;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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