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Onset of hexagons in surface-tension-driven Benard convection (1994)

Vanhook, Stephen J. ; Swift, John B. ; Mccormick, William D. ; [et al.]

In: CASI

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Publication Date: 2019-06-28

Description: High 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.

Keywords: FLUID MECHANICS AND HEAT TRANSFER

Type: NASA. Lewis Research Center, Second Microgravity Fluid Physics Conference; p 33-38

Format: application/pdf

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