通过螺旋结构的永磁体搭建了螺旋磁场,采用超声波多普勒测速的方法测量了螺旋磁场作用下GaInSn合金在圆柱和方形容器内轴向速度的分布情况.结果表明:圆柱容器内液态金属的轴向流动有大环流和二次流两种形态,其流动形式是旋转磁场和移动磁场共同作用的结果,二次流的发生大大降低了螺旋磁场轴向上的搅拌效果.
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