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Onset of hexagons in surface-tension-driven Benard convectionHigh resolution laboratory experiments with large aspect ratio are being conducted for thin fluid layers heated from below and bounded from above by a free surface. The fluid depths are chosen sufficiently small (less than 0.06 cm) so that surface tension is the dominant driving mechanisms; the Rayleigh number is less than 5 for the results reported here. Shadowgraph visualization reveals that the primary instability leading to hexagons is slightly hysteretic (approximately 1 percent). Preliminary measurements of the convection amplitude using infrared imaging are also presented.
Document ID
19950008113
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schatz, Michael F. (Texas Univ. Austin, TX, United States)
Vanhook, Stephen J. (Texas Univ. Austin, TX, United States)
Swift, John B. (Texas Univ. Austin, TX, United States)
Mccormick, William D. (Texas Univ. Austin, TX, United States)
Swinney, Harry L. (Texas Univ. Austin, TX, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1994
Publication Information
Publication: NASA. Lewis Research Center, Second Microgravity Fluid Physics Conference
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
95N14527
Funding Number(s)
CONTRACT_GRANT: NAG3-1382
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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