采用混合多相模型研究在机械搅拌过程中气孔缺陷的形成机制。研究表明,搅拌器附加的外力形成的负压,是卷入气体的主要因素;内负压区域主要在搅拌桨上方区域和桨叶附近区域,形成气孔缺陷。搅拌速度和搅拌时间影响气体在熔液中的分散,随着搅拌速度和搅拌时间逐渐增加,卷入的气体逐渐增加,且从集中区域向四周少量扩散。 A hybrid multiphase model was used to study the formation mechanism of stomatal defects during mechanical agitation. The research shows that the negative pressure generated by the additional external force of the agitator is the main factor involved in the gas. The negative pressure region is mainly in the area above the impeller and in the vicinity of the blade to form the pore defects. Stirring speed and stirring time affect the gas dispersion in the melt. As the stirring speed and agitation time gradually increase, the entrained gas gradually increases, and diffuses to a small amount from the concentrated area.