A series of pool boiling experiments have been conducted under reduced gravity condition (the order of 10−2 times the terrestrial gravity) available in an aircraft taking parabolic flight. A transparent resistant heater, a transparent indium oxide film plated on a glass plate, was employed so that the vapor/liquid behavior interacting with the heater surface could be observed from the rear side of the heater simultaneously with the side view of vapor bubbles above the heater surface. The experiments were performed for three different fluids—n-pentane, CFC-113, and water—under subcooled conditions. The critical heat fluxes for both n-pentane and CFC-113 under the reduced gravity were lowered to about 40 percent of the corresponding terrestrial values. Although the heat transfer characteristics in a low heat flux nucleate boiling regime for both n-pentane and CFC-113 showed no more than a slight change with the reduction in gravity, a significant heat transfer deterioration was noted with water in the reduced gravity boiling. The observation from the rear side of the heater suggested that this particular difference in the gravity dependency of heat transfer was ascribed to a considerable difference, between the organic fluids and water, in the behavior of attachment to the heater surface of the bubbles grown up, while the behavior of attachment must depend on the surface tension of each fluid and the wettability of the heater surface with the fluid.
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Pool Boiling of n-Pentane, CFC-113, and Water Under Reduced Gravity: Parabolic Flight Experiments With a Transparent Heater
T. Oka,
T. Oka
Department of Mechanical Engineering, Kelo University, Hiyoshi, Yokohama 223, Japan
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Y. Abe,
Y. Abe
Energy Materials Section, Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
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Y. H. Mori,
Y. H. Mori
Department of Mechanical Engineering, Kelo University, Hiyoshi, Yokohama 223, Japan
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A. Nagashima
A. Nagashima
Department of Mechanical Engineering, Kelo University, Hiyoshi, Yokohama 223, Japan
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T. Oka
Department of Mechanical Engineering, Kelo University, Hiyoshi, Yokohama 223, Japan
Y. Abe
Energy Materials Section, Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
Y. H. Mori
Department of Mechanical Engineering, Kelo University, Hiyoshi, Yokohama 223, Japan
A. Nagashima
Department of Mechanical Engineering, Kelo University, Hiyoshi, Yokohama 223, Japan
J. Heat Transfer. May 1995, 117(2): 408-417 (10 pages)
Published Online: May 1, 1995
Article history
Received:
October 1, 1993
Revised:
May 1, 1994
Online:
December 5, 2007
Citation
Oka, T., Abe, Y., Mori, Y. H., and Nagashima, A. (May 1, 1995). "Pool Boiling of n-Pentane, CFC-113, and Water Under Reduced Gravity: Parabolic Flight Experiments With a Transparent Heater." ASME. J. Heat Transfer. May 1995; 117(2): 408–417. https://doi.org/10.1115/1.2822537
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