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Convection of tin in a Bridgman system. II - An electrochemical method for detecting flow regimesAn ampoule was designed in order to obtain local flow behavior of the flow fields for convection of tin in a vertical Bridgman configuration. Multiple electrochemical cells were located along the periphery of the ampoule. Oxygen was titrated into the ampoule at one of the cell locations using a potentiostat and the concentration of oxygen was monitored at the other cell locations by operating the cells in a galvanic mode. Onset of oscillations were detected by means of thermocouples. We conclude that the flows are generally three dimensional for an aspect ratio of 5. Results on oscillations concurred with those of earlier workers. Suggestions for improved designs were made.
Document ID
19930043231
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sears, B.
(Florida Univ. Gainesville, United States)
Fripp, A. L.
(NASA Langley Research Center Hampton, VA, United States)
Debnam, W. J., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Woodell, G. A.
(NASA Langley Research Center Hampton, VA, United States)
Anderson, T. J.
(NASA Langley Research Center Hampton, VA, United States)
Narayanan, R.
(Florida Univ. Gainesville, United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1992
Publication Information
Publication: Journal of Crystal Growth
Volume: 125
Issue: 4-Mar
ISSN: 0022-0248
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A27228
Funding Number(s)
CONTRACT_GRANT: NAG1-609
Distribution Limits
Public
Copyright
Other

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