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Experiments on Suppression of Thermocapillary Oscillations in Float-Zones by High-Frequency End-Wall VibrationsExperiments to suppress thermocapillary oscillations using high-frequency vibrations were performed on float-zones. Such a float-zone is formed by melting one end of a vertically held sodium nitrate-barium nitrate crystal rod in contact with a hot surface at the top. In the experiments, when thermocapillary oscillation occurred, the bottom end of the rod was vibrated at a high frequency to generate fine ripples on the melt surface, driving a streaming flow in the opposite direction to that of the thermocapillary convection. It was observed that by generating a sufficiently strong streaming flow the thermocapillary flow can be offset enough such that the associated thermocapillarity oscillations can be quenched.
Document ID
20030061246
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Anilkumar, A. V.
Grugel, R. N.
Lee, C. P.
Bhowmick, J.
Wang, T. G.
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Fluid Mechanics And Thermodynamics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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