本文借助有限差分法对新型分离结晶法生长CdZnTe晶体过程中熔体内部的热毛细对流进行了三维数值模拟，获得了Marangoni数、高径比及狭缝宽度等无因次参数对流动的影响。结果表明：当Marangoni数较小时，流动为稳态流动，传热以导热为主，当Marangoni数超过一定数值后，流动发展为非稳态热毛细对流，对流的影响加大，中心竖直截面上的等温线变形加剧；随着高径比的增大，下自由表面处的流胞流动强度增强；随着狭缝宽度的增大，上下自由表面处的温度梯度和速度都有所减小。
In order to investigate the fundamental characteristics of thermocapiUary convection in detached solidification, the finite-difference method is adopted to carry on the three-dimensional numerical simulation in the present paper. The result shows that： when the Marangoni number is small, the flow in the melt liquid is stable, heat conduction is dominant. When the Marangoni number exceeds the critical value, the steady flow becomes unstable, the influence of convection gets enhanced, and the isothermal lines on the center vertical section get more distorted. With the ratio of the height to the radius increasing, the flow near the lower free surface gets stronger. With the width of gap increasing, both the temperature gradients and velocity on the free surfaces get decreased.
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