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本文采用全局数值模拟方法探讨了微重力条件下温度梯度对分离结晶Bridgman法晶体生长系统的作用规律。同时,在常重力条件下研究了坩埚半径对晶体生长系统的影响。结果发现,在微重力条件下随着温度梯度的增加,晶体生长系统内部的流动强度随之增加,且由于晶体生长系统低温区温度不断降低,使得结晶界面位置不断上升;在常重力条件下,重力的作用随着坩埚半径的增加而增强,导致晶体生长系统内部的流动强度增加,最大流函数增大。
In this paper, the global numerical simulation method is used to investigate the effect of temperature gradients on the crystal growth of Bridgman crystals isolated by microgravity. Meanwhile, the effect of crucible radius on the crystal growth system was studied under the conditions of normal gravity. The results show that with the increase of temperature gradient under microgravity condition, the flow strength inside the crystal growth system increases, and the temperature at the low temperature region of the crystal growth system decreases continuously, and the position of the crystal interface increases. Under the condition of normal gravity, The gravitational effect increases with the increase of crucible radius, which leads to the increase of the flow intensity inside the crystal growth system and the increase of the maximum flow function.