Optimization of structure on condensation on suherphydrophoibic surfaces (SHSs) and slippery lubricant-infused porous surfaces (SLIPS)

Daniel Orejon, Yota Maeda, Fengyong Lv, Peng Zhang, Yasuyuki Takata

研究成果: Contribution to journalConference article査読

抄録

Superhydrophobic Surfaces (SHSs) and Slippery Lubricant-Infused Porous Surfaces (SLIPSs) are proposed as excellent anti-icing, self-cleaning and condensation heat transfer surfaces due to their ability to repel water. The low droplet adhesion on SHSs and SLIPs is due to the low contact angle hysteresis displayed between the condensate and the surface, when compared to hydrophobic and/or to hydrophilic surfaces. In the case of SHSs, their extreme low adhesion is owed to the presence of air entrapped in between the condensate droplets and the surface, whereas in the case of SLIPS, their inherent low adhesion is due to the presence of a low surface energy lubricant oil in between the micro- and/or the nano-structures and the condensate. As a consequence, on both surfaces the condensate easily sheds by gravity and in the case of SHSs by coalescence-induced droplet-jumping. In this paper we investigate the condensation behavior on engineered SHSs and SLIPSs with structural roughness varying from the micro- to the nano-scale. Experimental observations and energy analysis is presented to demonstrate the different condensation performance observed depending on the surface structural finish underneath the condensate. We report the enhancement in the coalescence-induced droplet-jumping performance on SHSs and the greater theoretical heat transfer performance on SLIPSs. We conclude on the importance of taking into account the microstructures underneath the condensate for the optimum design of both SHSs and SLIPS.

本文言語英語
ページ(範囲)2425-2432
ページ数8
ジャーナルInternational Heat Transfer Conference
2018-August
DOI
出版ステータス出版済み - 2018
イベント16th International Heat Transfer Conference, IHTC 2018 - Beijing, 中国
継続期間: 8 10 20188 15 2018

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 機械工学
  • 流体および伝熱

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