NDLI: Heat Transfer and Bubble Behaviors in Microgravity Pool Boiling in ESA Parabolic Flight Experiment

Content Provider	Springer Nature Link
Author	Kawanami, Osamu Ohta, Haruhiko Kabov, Oleg Sakata, Yoshi Kotani, Yusuke Asada, Yuka Nagayasu, Tadashi Shinmoto, Yasuhisa Chikov, Sergey Queeckers, Patrick Straub, Johannes
Copyright Year	2009
Abstract	To clarify the relation between local heat transfer and bubble behaviors in pool boiling under microgravity conditions, a transparent heating surface, which has multiple array of heaters and temperature sensors, and experimental apparatus were developed to make the measurement of local heat transfer characteristics and the observation of liquid-vapor behavior simultaneously possible. In this paper, preliminary results of the microgravity pool boiling experiments conducted in ESA 49th parabolic flight campaign were reported. It was found that the bubble behaviors were strongly affected by the fluctuation of gravity in low-gravity period, and the effect of gravity on the bubble behaviors and heat transfer was dependent on the liquid subcooling. In the case of high subcooling, boiling bubbles were pushed on to the heating surface during positive low-g, and heat transfer due to microlayer evaporation was enhanced. On the other hand, during negative low-g period, bubbles detached from the heating surface, and the heat transfer rate was decreased. This trend, however, completely inverted at low subcooling. In positive low-g, the heat transfer was deteriorated because the dry patch was extended on the heating surface.
Starting Page	3
Ending Page	8
Page Count	6
File Format	PDF
ISSN	09380108
Journal	Microgravity Science and Technology
Volume Number	21
Issue Number	1
e-ISSN	18750494
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-07-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pool boiling Heat transfer Bubble behavior Microgravity experiment Mechanics, Fluids, Thermodynamics Extraterrestrial Physics, Space Sciences Aerospace Technology and Astronautics
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Physics and Astronomy Engineering Modeling and Simulation

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