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

Research output: Contribution to journalConference article

Abstract

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.

Original languageEnglish
Pages (from-to)2425-2432
Number of pages8
JournalInternational Heat Transfer Conference
Volume2018-August
Publication statusPublished - Jan 1 2018
Event16th International Heat Transfer Conference, IHTC 2018 - Beijing, China
Duration: Aug 10 2018Aug 15 2018

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lubricants
Lubricants
Condensation
condensation
optimization
condensates
adhesion
Adhesion
Coalescence
coalescing
heat transfer
Heat transfer
ice formation
Interfacial energy

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Optimization of structure on condensation on suherphydrophoibic surfaces (SHSs) and slippery lubricant-infused porous surfaces (SLIPS). / Orejon, Daniel; Maeda, Yota; Lv, Fengyong; Zhang, Peng; Takata, Yasuyuki.

In: International Heat Transfer Conference, Vol. 2018-August, 01.01.2018, p. 2425-2432.

Research output: Contribution to journalConference article

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AU - Maeda, Yota

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AU - Takata, Yasuyuki

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