Superhydrophobicity or icephobicity for an effective icing mitigation strategy?

Carlo Antonini, A. Amirfazli, Marco Marengo

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

Abstract

There is a growing interest and debate on the role of surface coatings to combat ice accretion on solid surfaces. Most of the studies have focused on "icephobicity", with the aim of either reducing ice adhesion strength or delaying freezing time. Here we present an alternative strategy, which relies on the superhydrophobicity of surfaces as a way to enhance liquid water shedding from a surface prior to water freezing. To show in which conditions liquid water drops can rebound and be shed from a solid surface before freezing, drop impact experiments were performed on solid targets characterized by different wettability and thermal properties. The main result is that, when frost formation is avoided on the surfaces (i.e. if surface temperature is above dew point), drop dynamics, including spreading and recoiling, remains unaffected by solidification effects. In particular, drop rebound can still be achieved down to-20°C.

Original languageEnglish
Title of host publicationProceedings of the 15th International Heat Transfer Conference
Place of PublicationKyoto, Japan
Pages0-0
Number of pages1
DOIs
Publication statusPublished - 15 Aug 2014
Event15th International Heat Transfer Conference, IHTC 2014 - Kyoto, Japan
Duration: 10 Aug 201415 Aug 2014

Publication series

Name
ISSN (Electronic)2377-424X

Conference

Conference15th International Heat Transfer Conference, IHTC 2014
CountryJapan
CityKyoto
Period10/08/1415/08/14

Keywords

  • Anti-icing coating
  • Drop impact
  • Icephobicity
  • Icing mitigation
  • Superhydrophobicity
  • Two-phase/Multiphase flow

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  • Cite this

    Antonini, C., Amirfazli, A., & Marengo, M. (2014). Superhydrophobicity or icephobicity for an effective icing mitigation strategy? In Proceedings of the 15th International Heat Transfer Conference (pp. 0-0). https://doi.org/10.1615/ihtc15.nmt.009482