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大直径单晶硅垂直磁场下的数值模拟 被引量:2

Numerical Simulation of Large Diameter Czochralski Crystal Silicon With a Vertical Magnetic Field
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摘要 为了研究磁场对晶体生长界面的形状、温度、氧的质量分数分布等的影响,本文采用低雷诺数的κ-ε湍流模型,对直径为200 mm、哈特曼数分别为0、500、1000和2000的大直径单晶硅进行了数值模拟.结果表明,垂直磁场能抑制熔体中的径向对流,并在一定程度上使子午面的流动减弱,氧的轴向减小,等温线变得更为平坦.当磁场强度过高时,熔体中氧的轴向增加,湍流程度也增加. It is known that the shape of the growth interface, the temperature, oxygen concentration distribution are sensitive to the magnetic field strength. In this paper, a low Reynolds number model was used for the simulation of a 200 mm large diameter silicon crystal growth under a vertical magnetic field with different strength, the Hartmann number is equal to 0, 500, 1 000 and 2 000 respectively. Numerical results showed that a vertical magnetic field can effectively reduce the strength of the flow at the radi...
出处 《北京工业大学学报》 CAS CSCD 北大核心 2006年第S1期68-73,共6页 Journal of Beijing University of Technology
基金 国家自然科学基金资助(10472003) 北京市自然科学基金资助(3042002) 北京工业大学博士启动基金资助(127-00227)
关键词 直拉法 磁场 数值模拟 czochralski magnetic field simulation
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