Observational study of pool boiling under microgravity

Toshiharu Oka, Yoshiyuki Abe, Kotaro Tanaka, Yasuhiko H. Mori, Akira Nagashima

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Pool boiling experiments under microgravity were conducted, utilizing parabolic flight maneuvers with a CNES Caravelle 6R aircraft. The experimental apparatus taken aboard the aircraft was constructed to enable simultaneous recording, by a video camera, of the side view of vapor bubbles generated on Joule-heated titanium foil immersed in a pool of n-pentane liquid, and the color pattern exhibited by a liquid-crystal layer, which was plated on the backside of the foil. This apparatus successfully recorded observations of behaviors of vapor bubbles, at various liquid subcoolings (7-32 K) and heat fluxes (1.1-42 kW/m3), and spatial color variation of the crystal layer, possibly reflecting microlayer dynamics beneath the individual bubbles. In spite of the great difference in size and population of the bubbles, between microgravity and terrestial conditions, we found no more than a moderate difference in overall heat transfer between the two conditions.

Original languageEnglish
Pages (from-to)280-286
Number of pages7
JournalJSME International Journal, Series 2: Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties
Issue number2
Publication statusPublished - 1992
Externally publishedYes

ASJC Scopus subject areas

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


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