Stability of buoyancy-driven convection in directional solidification of a binary melt

被引:0
作者
In Gook Hwang
Chang Kyun Choi
机构
[1] The University of Suwon,Department of Chemical and Biochemical Engineering
[2] Seoul National University,School of Chemical and Biological Engineering
来源
Korean Journal of Chemical Engineering | 2009年 / 26卷
关键词
Directional Solidification; Buoyancy-driven Convection; Propagation Theory; Self-similar Stability Analysis;
D O I
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中图分类号
学科分类号
摘要
In directional solidification, compositional convection can be driven by an unstable density gradient in the melt. In this paper convective instabilities in liquid and mushy layers during solidification of a horizontal binary melt are analyzed by using the propagation theory. The self-similar stability equations are used to examine the boundary-mode and mushy-layer-mode of convection. The effects of velocity conditions at the liquid-mush interface on the onset of convection are discussed. The critical Darcy-Rayleigh number for the convection in the mushy layer decreases with increasing the temperature of a cooled boundary.
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页码:930 / 934
页数:4
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