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本文针对多晶硅铸锭定向凝固过程中行波磁场作用下的传热流动特性开展数值模拟研究.将低频磁场作用下的洛伦兹力纳入多晶硅铸锭全局传热流动的计算当中,研究了单纯洛伦兹力作用以及洛伦兹力与热浮力耦合作用时硅熔体区域的传热流动特性,明确了能够影响多晶硅铸锭过程的有效磁场强度范围.研究结果表明,10-3 T以上的磁场强度才能够产生足够大的洛伦兹力以强化或消弱热浮力作用,不同方向行波磁场下的洛伦兹力对硅熔体中传热流动特性的作用效果大相径庭.“,”We numerically studied the influence of traveling magnetic field (TMF) on the heat transfer and silicon melt flow in the directional solidification (DS) process for multi-crystalline silicon (mc-Si) ingots.The Lorentz force generated by a low frequency magnetic field was incorporated in the global heat transfer model to study the influence of Lorentz force and its coupled effects with thermal buoyancy force on the heat transfer and melt flow in the silicon region.The effective range of magnetic field intensity that can influence the DS process was also revealed.The results show that the minimum magnetic field intensity that can strengthen or weaken the effect of thermal buoyancy force is 10-3 T.The TMF with different directions has opposite influence on the thermal and flow fields in the silicon melt.