TY - JOUR
T1 - Experimental study of water droplets on over-heated nano/microstructured zirconium surfaces
AU - Kim, Seol Ha
AU - Ahn, Ho Seon
AU - Kim, Joonwon
AU - Kim, Moo Hwan
AU - Park, Hyun Sun
PY - 2014/10/15
Y1 - 2014/10/15
N2 - In this study, we observed the behavior of water droplets near the Leidenfrost point (LFP) on zirconium alloy surfaces with anodizing treatment and investigated the droplet cooling performance. The anodized zirconium surface, which consists of bundles of nanotubes (∼10-100 nm) or micro-mountain-like structures, improved the wetting characteristics of the surface. A deionized water droplet (6 μL) was dropped onto test surfaces heated to temperatures ranging from 250 °C to the LFP. The droplet dynamics were investigated through high-speed visualization, and the cooling performance was discussed in terms of the droplet evaporation time. The modified surface provided vigorous, intensive nucleate boiling in comparison with a clean, bare surface. Additionally, we observed that the structured surface had a delayed LFP due to the high wetting condition induced by strong capillary wicking forces on the structured surface.
AB - In this study, we observed the behavior of water droplets near the Leidenfrost point (LFP) on zirconium alloy surfaces with anodizing treatment and investigated the droplet cooling performance. The anodized zirconium surface, which consists of bundles of nanotubes (∼10-100 nm) or micro-mountain-like structures, improved the wetting characteristics of the surface. A deionized water droplet (6 μL) was dropped onto test surfaces heated to temperatures ranging from 250 °C to the LFP. The droplet dynamics were investigated through high-speed visualization, and the cooling performance was discussed in terms of the droplet evaporation time. The modified surface provided vigorous, intensive nucleate boiling in comparison with a clean, bare surface. Additionally, we observed that the structured surface had a delayed LFP due to the high wetting condition induced by strong capillary wicking forces on the structured surface.
UR - http://www.scopus.com/inward/record.url?scp=84906880587&partnerID=8YFLogxK
U2 - 10.1016/j.nucengdes.2014.06.042
DO - 10.1016/j.nucengdes.2014.06.042
M3 - Article
AN - SCOPUS:84906880587
SN - 0029-5493
VL - 278
SP - 367
EP - 376
JO - Nuclear Engineering and Design
JF - Nuclear Engineering and Design
ER -