Visualization of droplet departure on a superhydrophobic surface and implications to heat transfer enhancement during dropwise condensation
Visualization of droplet departure on a superhydrophobic surface and implications to heat transfer enhancement during dropwise condensation
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DOI：
10.1063/1.3460275
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发表时间：
2010-07-19
影响因子：
4
通讯作者：
Joshi, Y.
中科院分区：
文献类型：
--
作者：
Dietz, C.;Rykaczewski, K.;Joshi, Y.
利用环境扫描电子显微镜研究了超疏水表面上的液滴脱离频率，并探讨了其对提高滴状冷凝速率的影响。由氢氧化铜纳米结构形成的超疏水表面允许冷凝物以与水平面成30度的倾斜角离开表面。由此产生的液滴偏离尺寸的减小使液滴尺寸分布向更小的半径移动，这可以增强滴状冷凝期间的传热速率。通过修改Rose和Le Fevre液滴分布函数来估计传热增强，以考虑超疏水表面上较小的最大液滴尺寸。(C)2010年美国物理学会。[doi：10.1063/1.3460275]
Droplet departure frequency is investigated using environmental scanning electron microscopy with implications to enhancing the rate of dropwise condensation on superhydrophobic surfaces. Superhydrophobic surfaces, formed by cupric hydroxide nanostructures, allow the condensate to depart from a surface with a tilt angle of 30 degrees from the horizontal. The resulting decrease in drop departure size shifts the drop size distribution to smaller radii, which may enhance the heat transfer rate during dropwise condensation. The heat transfer enhancement is estimated by modifying the Rose and Le Fevre drop distribution function to account for a smaller maximum droplet size on a superhydrophobic surface. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3460275]