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Shear stabilization of solidification frontsA linear-stability analysis is performed on the interface formed during the directional solidification of a dilute binary alloy in the presence of a time-periodic flow. In general, the flow is generated by the elliptical motion of the crystal parallel to the interface. The presence of the flow can either stabilize or destabilize the system relative to the case without flow with the result depending on the frequency and amplitude of the oscillations as well as the properties of the material. In the particular, we find that the morphological instability present in the absence of flow can be entirely suppressed with respect to disturbances of the same frequency as the oscillation.
Document ID
19950008135
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Davis, Stephen H.
(Northwestern Univ. Evanston, IL, United States)
Schulze, T. P.
(Northwestern Univ. Evanston, IL, 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
Metallic Materials
Accession Number
95N14549
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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