中国物理B ›› 2012, Vol. 21 ›› Issue (5): 56401-056401.doi: 10.1088/1674-1056/21/5/056401
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
曹斌,林鑫,王猛,黄卫东
Cao Bin(曹斌), Lin Xin(林鑫)†, Wang Meng(王猛), and Huang Wei-Dong(黄卫东)
摘要: The solutions of temperature and solute fields around a spherical crystal growing from a binary melt under the far-field flow are obtained. Based on the results, a linear stability analysis on the spherical interface growing from the binary melt under the far-field flow is performed. It is found that the constitutional supercooling effect ahead of the spherical crystal interface under the far-field flow is enhanced compared with that without the flow. The growth rate of the perturbation amplitude at the up-wind side of the spherical crystal interface is larger than that at the down-wind side. The critical stability radius of the crystal interface decreases with the increasing far-field flow velocity. Under the far-field flow, the whole spherical interface becomes more unstable compared with that without the flow.
中图分类号: (Solid-liquid transitions)