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：
暂无
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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