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Convection phenomena during the growth of sodium chlorate crystals from solutionThe paper examines convection phenomena during the growth of sodium chlorate crystals from solution. Schlieren observations of sodium chlorate crystals suspended in supersaturated solutions showed that with increase in supersaturation or crystal size, the boundary layer on the side faces was stable while the top boundary layer and emerging plume changed from stable to partially oscillatory. The transition was a function of the Grashof number, Gr sub top, and the crystal height. Gr sub top correlated with plume width, number of streamlines, eddy density, and plume velocity, but the oscillation period correlated with the weight increase growth rate. The mass transfer rate, the linear growth rate, and growth of vertical and horizontal faces are discussed, and an estimate of boundary layer flow vs growth rate for near-critical stable convection indicated that growth of side faces depleted over half of the excess solute in the boundary layer. Impulse energies greatly in excess of the threshold value caused transient separation of the boundary layer on the top face, and plume wavering due to background-induced fluid motion was observed only at the lowest supersaturations.
Document ID
19800031505
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chen, P. S.
(Southern California, University Los Angeles, Calif., United States)
Shlichta, P. J.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Wilcox, W. R.
(Clarkson College of Technology Potsdam, N.Y., United States)
Lefever, R. A.
(Ampex Corp. El Segundo, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1979
Publication Information
Publication: Journal of Crystal Growth
Volume: 47
Subject Category
Solid-State Physics
Accession Number
80A15675
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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