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本文给出了对二种熔液法生长晶体的液相流场进行的计算机模拟的结果,对CZ法晶体生长的定常流场数值计算,采用了二阶迎风QUICK差分格式的有限控制体积法,通过对12种不同参数的流场情况所作的计算表明,二阶QUICK格式具有更高的计算精度和数值稳定性。对离心机环境下的水平Bridgman晶体生长的流场进行了三维非定常的数值模拟。结果表明,在一定的旋转方向和旋转速率条件下,离心机环境中的Coriolis力对熔体振荡流动有致稳作用。计算结果符合以往实验的发现,并优于二维非定常模拟结果。
In this paper, the results of computer simulation of the liquid flow field of two kinds of crystal grown by melt method are presented. The steady flow field of CZ method is calculated by the finite volume method of second-order upwind QUICK difference scheme, The calculation of flow field in 12 different parameters shows that the second order QUICK scheme has higher accuracy and numerical stability. The three-dimensional unsteady numerical simulation of the flow field of a horizontal Bridgman crystal in a centrifuge environment was carried out. The results show that the Coriolis force in the centrifugal environment stabilizes the oscillatory flow of the melt under a certain rotation direction and rotation rate. The calculated results accord with the findings of previous experiments and are superior to 2D unsteady simulation results.