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首页> 外文期刊>International Journal of Heat and Mass Transfer >Effect of static magnetic field on thermal conductivity measurement of a molten Si droplet by an EML technique: Comparison between numerical and experimental results
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Effect of static magnetic field on thermal conductivity measurement of a molten Si droplet by an EML technique: Comparison between numerical and experimental results

机译：静磁场对通过EML技术测量熔融硅滴导热系数的影响：数值与实验结果的比较

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摘要

In order to investigate quantitatively the effect of melt convection in an electromagnetically levitated molten droplet on the thermal conductivity of liquid silicon measured by the electromagnetic levitation (EML) technique superimposed with a static magnetic field, the numerical simulations for melt convection in the droplet and additionally, for the measurement of thermal conductivity were carried out. In addition, the thermal conductivity of molten silicon was measured by the EML technique, and then compared with those obtained numerically. In the numerical simulations of melt convection, the buoyancy force, thermocapillary force due to the temperature dependence of the surface tension on the melt surface, and electromagnetic force in the droplet were considered as the driving forces of convection. As a result, the numerical simulations could sufficiently explain the measurement of thermal conductivity by the EML technique under a static magnetic field. Also, it was suggested that a magnetic field of more than 4T should be applied to measure the real thermal conductivity of molten silicon by the EML technique.
机译：为了定量研究悬浮在电磁悬浮熔滴中的熔体对流对液化硅热导率的影响（通过电磁悬浮（EML）技术叠加了静磁场），对液滴中的熔体对流进行了数值模拟进行热导率的测定。另外，通过EML技术测量熔融硅的热导率，然后将其与数值获得的热导率进行比较。在熔体对流的数值模拟中，浮力，由于熔体表面上表面张力的温度依赖性而产生的热毛细作用力和液滴中的电磁力被认为是对流的驱动力。结果，数值模拟可以充分解释在静磁场下通过EML技术进行的热导率测量。另外，建议应通过EML技术施加大于4T的磁场来测量熔融硅的真​​实热导率。

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