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  4. Volume change effect on the salt-finger stability of directionally solidifying ammonium chloride solution
 
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Volume change effect on the salt-finger stability of directionally solidifying ammonium chloride solution

Resource
Journal of Crystal Growth 154 (3-4): 351-363
Journal
Journal of Crystal Growth
Journal Issue
154
Pages
351-363
Date Issued
1995
Date
1995
Author(s)
Lee, Y. C.
Chen, Falin  
DOI
10.1016/0022-0248(95)00174-3
URI
http://ntur.lib.ntu.edu.tw//handle/246246/120074
https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029633159&doi=10.1016%2f0022-0248%2895%2900174-3&partnerID=40&md5=8d45116ed06679ca769134b69fa11dfe
Abstract
The effect of the volume change due to phase transformation on the stability of salt-finger convection of directionally solidifying NH4Cl aqueous solution cooling from below is investigated. The basic flow, induced by the volume change, not only changes the morphology and the depth of the dendritic mushy layer, but also influences the stability of salt-finger convection. A new mathematical model is proposed, which differs from the previous one mainly on the dynamical condition at the melt/mush interface. This difference not only leads to a less stable state, but can also be crucial to the dynamical behavior of the oscillatory instability mode since the convection cells of this mode are coupled viscously through the interface. In the discussion, special emphasis is placed on the volume change effect on the instability mode competition, which may be influential to the stability characteristics of the subsequent plume convection. © 1995.
Other Subjects
Dynamics; Flow of fluids; Interfaces (materials); Mathematical models; Molten materials; Morphology; Phase transitions; Solidification; Stability; Ammonium chloride; Dendritic mushy layer; Directional solidification; Melt/mush interface; Oscillatory instability mode; Salt-finger convection; Salt-finger stability; Volume change effect; Ammonium compounds
Type
journal article
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