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通过对单元体内溶质守恒的分析，修正了Ｂｅｎｎｏｎ和Ｉｎｃｒｏｐｅｒａ模型中的溶质守桓方程．采用修正后的控制方程，模拟了铸锭凝固过程中流场、温度场和浓度场的相互作用．
The solute retention equation in the Bennon and Incropera models was modified by analyzing the solute conservation in the unit cell. The modified governing equation was used to simulate the interaction between flow field, temperature field and concentration field in ingot solidification process.