Effect of surface wettability on boiling and evaporation

Yasuyuki Takata, S. Hidaka, J. M. Cao, T. Nakamura, H. Yamamoto, M. Masuda, T. Ito

Research output: Contribution to journalArticle

167 Citations (Scopus)

Abstract

Titanium dioxide, TiO2, is one of the photocatalysts that has a very unique characteristic. The surface coated with TiO2 exhibits extremely high affinity for water by exposing the surface to UV light and the contact angle decreases nearly to zero. On the contrary, the contact angle increases when the surface is shielded from UV light. We applied this superhydrophilic nature to enhancement of boiling and evaporation heat transfer. Experiments of pool boiling and evaporation of single water droplet have been performed to manifest the effect of high wettability on heat transfer characteristics. Both of TiO2-coated and non-coated surfaces were used for comparison in each experiment. It is found that (1) the critical heat flux (CHF) of TiO2-coated surface is about two times larger than that of non-coated one, and (2) Leiden-frost temperature increases as the contact angle decreases. The superhydrophilic surface can be an ideal heat transfer surface.

Original languageEnglish
Pages (from-to)209-220
Number of pages12
JournalEnergy
Volume30
Issue number2-4 SPEC. ISS.
DOIs
Publication statusPublished - Jan 1 2005

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Boiling liquids
Wetting
Evaporation
Contact angle
Heat transfer
Ultraviolet radiation
Photocatalysts
Titanium dioxide
Heat flux
Water
Experiments

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Takata, Y., Hidaka, S., Cao, J. M., Nakamura, T., Yamamoto, H., Masuda, M., & Ito, T. (2005). Effect of surface wettability on boiling and evaporation. Energy, 30(2-4 SPEC. ISS.), 209-220. https://doi.org/10.1016/j.energy.2004.05.004

Effect of surface wettability on boiling and evaporation. / Takata, Yasuyuki; Hidaka, S.; Cao, J. M.; Nakamura, T.; Yamamoto, H.; Masuda, M.; Ito, T.

In: Energy, Vol. 30, No. 2-4 SPEC. ISS., 01.01.2005, p. 209-220.

Research output: Contribution to journalArticle

Takata, Y, Hidaka, S, Cao, JM, Nakamura, T, Yamamoto, H, Masuda, M & Ito, T 2005, 'Effect of surface wettability on boiling and evaporation', Energy, vol. 30, no. 2-4 SPEC. ISS., pp. 209-220. https://doi.org/10.1016/j.energy.2004.05.004
Takata Y, Hidaka S, Cao JM, Nakamura T, Yamamoto H, Masuda M et al. Effect of surface wettability on boiling and evaporation. Energy. 2005 Jan 1;30(2-4 SPEC. ISS.):209-220. https://doi.org/10.1016/j.energy.2004.05.004
Takata, Yasuyuki ; Hidaka, S. ; Cao, J. M. ; Nakamura, T. ; Yamamoto, H. ; Masuda, M. ; Ito, T. / Effect of surface wettability on boiling and evaporation. In: Energy. 2005 ; Vol. 30, No. 2-4 SPEC. ISS. pp. 209-220.
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