Boiling heat transfer characteristics with highly wettable heated surface under forced convection conditions

Toru Mitsutake, Fumihisa Kano, Tetsuo Oosato, Akio Sayano, Miyuki Akiba, Shinichi Morooka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Under forced convection and atmospheric pressure conditions, heat transfer characteristics were studied using an annulus channel of a heater rod with highly-wettable surface. Improvement of phase change heat transfer under boiling and condensation process requires that either liquid heated or vapor cooled can contact a heat transfer surface effectively, but either a vapor layer or a liquid film can be formed repeatedly on the surface during boiling and condensation processes. As oxide semiconductor materials are known to be highly wettable, TiO2 was coated on a heater rod surface. The Leidenfrost temperature for the TiO2 coated surface was higher than that for the uncoated surface. Under mass flux conditions from 600 to 1700kg/m2s, the heater rod surface temperature at variable power conditions was measured. A higher heat flux at the point where the forced convection vaporization started and a larger critical heat flux were observed for the TiO2 coated surface than that for the uncoated surface.

Original languageEnglish
Pages (from-to)168-172
Number of pages5
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Volume47
Issue number2
DOIs
Publication statusPublished - 2004 May
Externally publishedYes

Fingerprint

forced convection
Forced convection
boiling
Boiling liquids
heat transfer
Heat transfer
heaters
rods
heat flux
Heat flux
condensation
Condensation
vapors
Vapors
annuli
liquids
Liquid films
surface temperature
Vaporization
Contacts (fluid mechanics)

Keywords

  • Critical heat flux
  • Forced convection
  • Oxide semiconductor coating
  • Wettable heater surface

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Cite this

Boiling heat transfer characteristics with highly wettable heated surface under forced convection conditions. / Mitsutake, Toru; Kano, Fumihisa; Oosato, Tetsuo; Sayano, Akio; Akiba, Miyuki; Morooka, Shinichi.

In: JSME International Journal, Series B: Fluids and Thermal Engineering, Vol. 47, No. 2, 05.2004, p. 168-172.

Research output: Contribution to journalArticle

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