华中科技大学学报（自然科学版）2013，Vol.41Issue(4)：93-97,5.
地面分离结晶过程中熔体内部的流动特征
Characteristics of convection in detached solidification on the ground
摘要
Abstract
To understand the melt flow characteristics in detached solidification, 3-D numerical simulations of thermocapillary-buoyancy convection of CdZnTe melt were conducted by using the finite-difference method with the non-dimensional height of melt H=1 and the width of gap B = 0.100, 0. 075, 0. 05 and 0. 025. The results indicate that the melt flow is weak and the state is steady when Marangoni number is small. However, with increasing Marangoni number, the melt flow enhances and the temperature gradient increases gradually. The flow changes into unsteady flow when Marangoni number exceeds the critical value, and temperature oscillation and velocity oscillation are characteristics of the instability. In addition, the critical Marangoni number gets increase with decrease of the gap.关键词
晶体生长/数值模拟/分离结晶/热毛细-浮力对流/Marangoni数Key words
crystal growth/ numerical simulation/ detached solidification/ thermocapillary-buoyancy convention/ Marangoni number分类
数理科学引用本文复制引用
李震,彭岚,李友荣,屠竞毅..地面分离结晶过程中熔体内部的流动特征[J].华中科技大学学报（自然科学版）,2013,41(4):93-97,5.基金项目
国家自然科学基金资助项目(51076173) （51076173）
中央高校基本科研业务费资助项目(CDJXS11141150). （CDJXS11141150）
