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首页> 外文期刊>Journal of Crystal Growth >Numerical study on transport phenomena in a directional solidification process in the presence of travelling magnetic fields
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Numerical study on transport phenomena in a directional solidification process in the presence of travelling magnetic fields

机译:磁场作用下定向凝固过程中输运现象的数值研究

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Buoyancy-driven flow plays an important role in the solidification of multi-crystalline silicon in rectangular crucibles and has been subject of recent investigations (Miyazawa et al., 2008 [1,2], Delannoy et al., 2007 [3]). Though the driving force due to the slightly curved temperature profiles is small, the large dimensions of industrial-scale crucibles can lead to complex flow.rnHere we present transient 3D calculations of melt convection. Thermal boundary conditions were either given analytically or resulted from 3D global calculations.rnThe influence of the shape of the thermal boundary conditions, the mesh type and the flow model on the melt flow has been studied. Furthermore, we applied Lorentz forces to the melt system, created by travelling magnetic fields (TMFs). Preliminary results on the time evolution of the flow patterns in the presence of TMFs will be shown.
机译:浮力驱动的流动在矩形坩埚中的多晶硅固化中起着重要作用,并且已经成为近期研究的主题(Miyazawa等人,2008 [1,2],Delannoy等人,2007 [3])。尽管由于温度曲线略微弯曲而产生的驱动力很小,但是工业级坩埚的大尺寸尺寸可能导致复杂的流动。这里,我们介绍了熔体对流的瞬态3D计算。可以通过分析给出热边界条件,也可以通过3D全局计算得出热边界条件。研究了热边界条件的形状,网格类型和流动模型对熔体流动的影响。此外,我们将洛伦兹力施加到由行进磁场(TMF)创建的熔体系统上。将显示在TMF存在下流型随时间变化的初步结果。

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