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Characteristics and Stability of Compositional Convection in Binary Solidification with a Constant Solidification Velocity
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  • Journal title : Korean Chemical Engineering Research
  • Volume 52, Issue 2,  2014, pp.199-204
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2014.52.2.199
 Title & Authors
Characteristics and Stability of Compositional Convection in Binary Solidification with a Constant Solidification Velocity
Hwang, In Gook;
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 Abstract
In binary solidification compositional convection in a porous mushy layer influences the quality of the final products. We consider the mushy layer solidifying from below with a constant solidification velocity. The disturbance equations for the mushy layer are derived using linear stability theory. The basic-state temperature fields and the distribution of the porosity in the mushy layer are investigated numerically. When the superheat is large, the thickness of the mushy layer is relatively small compared to the thickness of the thermal boundary layer. With decreasing the superheat the critical Rayleigh number based on the thickness of the mushy layer increases and the mushy layer becomes stable to the compositional convection. The critical Rayleigh number obtained from the continuity conditions of temperature and heat flux at the mush-liquid interface is smaller than that from the isothermal condition at the upper boundary of the mushy layer.
 Keywords
Binary Solidification;Compositional Convection;Mushy Layer;Rayleigh Number;Linear Stability;
 Language
Korean
 Cited by
1.
The Onset of Tayler-Görtler Vortices in Impulsively Decelerating Circular Flow,;;

Korean Chemical Engineering Research, 2015. vol.53. 5, pp.609-613 crossref(new window)
1.
The Onset of Tayler-Görtler Vortices in Impulsively Decelerating Circular Flow, Korean Chemical Engineering Research, 2015, 53, 5, 609  crossref(new windwow)
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