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Experimental observation of the thermocapillary driven motion of bubbles in a molten glass under low gravity conditionsAn experiment was carried out on board a Space Processing Applications Rocket with the aim of demonstrating bubble migration in molten glass due to a temperature gradient under low gravity conditions. During the flight, a sample of a sodium borate melt with a specific bubble array, contained in a platinum/fused silica cell, was subjected to a well defined temperature gradient for more than 4 minutes. Photographs taken at one second intervals during the experiment clearly show that the bubbles move toward the hot spot on the platinum heater strip. This result is consistent with the predictions of the theory of thermocapillary driven bubble motion.
Document ID
19830062065
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Smith, H. D.
(Westinghouse Research and Development Center Pittsburgh, PA, United States)
Mattox, D. M.
(Westinghouse Research and Development Center Pittsburgh, PA, United States)
Wilcox, W. R.
(Westinghouse Research and Development Center Pittsburgh, PA, United States)
Subramanian, R. S.
(Westinghouse Research and Development Center Pittsburgh, PA, United States)
Meyyappan, M.
(Clarkson College of Technology Potsdam, NY, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Astronautics (General)
Meeting Information
Meeting: Materials processing in the reduced gravity environment of space; Annual Meeting
Location: Boston, MA
Start Date: November 16, 1981
End Date: November 18, 1981
Sponsors: NASA
Accession Number
83A43283
Funding Number(s)
CONTRACT_GRANT: NAS8-33017
Distribution Limits
Public
Copyright
Other

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