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Utilizing Controlled Vibrations in a Microgravity Environment to Understand and Promote Microstructural Homogeneity During Float-Zone Crystal GrowthOur previous experiments with NaNO3 float-zones revealed that steady thermocapillary flow can be balanced/offset by the controlled surface streaming flow induced by end-wall vibration. In the current experiments we are examining the effects of streaming flow on steadying/stabilizing nonsteady thermocapillary flow in such zones. To this effect we have set up a controlled NaNO3 half-zone experiment, where the processing parameters, like zone dimensions and temperature gradients, can be easily varied to generate nonsteady thermocapillary flows. In the present paper we present preliminary results of our investigations into stabilizing such flows by employing end-wall vibration.
Document ID
20000070802
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Anilkumar, A. V.
(Vanderbilt Univ. Nashville, TN United States)
Bhowmick, J.
(Vanderbilt Univ. Nashville, TN United States)
Grugel, R. N.a
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Space Processing
Meeting Information
Meeting: Materials Science
Location: Huntsville, AL
Country: United States
Start Date: June 7, 2000
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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