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首页> 外文期刊>Flow, turbulence and combustion >Melt Motion Due to Peltier Marking during Bridgman Crystal Growth with an Axial Magnetic Field
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Melt Motion Due to Peltier Marking during Bridgman Crystal Growth with an Axial Magnetic Field

机译：在具有轴向磁场的布里奇曼晶体生长过程中，由于珀尔帖标记引起的熔体运动

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This paper treats a liquid-metal flow inside an electrically insulating cylinder with electrically conducting solids above and below the liquid region. There is a uniform axial magnetic field, and there is an electric current through the liquid and both solids. Since the lower liquid-solid interface is concave into the solid and since the liquid is a better electrical conductor than the adjacent solid, the electric current is locally concentrated near the centerline. The return to a uniform current distribution involves a radial electric current which interacts with the axial magnetic field to drive an azimuthal flow. The axial variation of the centrifugal force due to the azimuthal velocity drives a meridional circulation with radial and axial velocities. This problem models the effects of Peltier marking during the vertical Bridgman growth of semiconductor crystals with an externally applied magnetic field, where the meridional circulation due to the Peltier current may produce important mixing in the molten semiconductor.
机译：本文用液体区域上方和下方的导电固体处理电绝缘圆柱体内的液态金属流。有一个均匀的轴向磁场，并且有电流通过液体和两种固体。由于下部液固界面凹入固体中，并且由于液体是比相邻固体更好的电导体，因此电流局部集中在中心线附近。返回均匀电流分布涉及径向电流，该径向电流与轴向磁场相互作用以驱动方位角流。由于方位角速度而产生的离心力的轴向变化会驱动具有径向和轴向速度的子午循环。这个问题模拟了在外部施加磁场的情况下半导体晶体在垂直布里奇曼生长期间珀耳帖标记的影响，在该垂直布里奇曼生长中，由于珀耳帖电流引起的子午循环可能会在熔融半导体中产生重要的混合。

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