Mathematical simulation on coupled flow, heat, and solute transport in slab continuous casting process
Mathematical simulation on coupled flow, heat, and solute transport in slab continuous casting process
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DOI：
10.1007/s11663-998-0058-2
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发表时间：
1998-12
期刊：
影响因子：
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通讯作者：
Hongliang Yang;Xingzhong Zhang;Kaiwen Deng;Wencai Li;Y. Gan;L. Zhao
中科院分区：
文献类型：
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作者：
Hongliang Yang;Xingzhong Zhang;Kaiwen Deng;Wencai Li;Y. Gan;L. Zhao
建立了一个三维综合耦合模型来描述连铸过程中的流体流动、传热、凝固和溶质重分布等输运现象。连铸过程被认为是一个多组分固-液相系统中的凝固过程。利用多孔介质理论模拟了糊状区柱状枝晶对流体流动的阻塞。论证了流型与固体壳体形状之间的关系。考虑了由温度梯度和浓度梯度引起的双扩散对流。还考虑了液相温度随液体浓度的变化。研究了宏观偏析的形成机理。将计算得到的固体壳层厚度和液芯温度分布与实测值进行比较，验证了模型的正确性。
A three-dimensional comprehensively coupled model has been developed to describe the transport phenomena, including fluid flow, heat transfer, solidification, and solute redistribution in the continuous casting process. The continuous casting process is considered as a solidification process in a multicomponent solid-liquid phase system. The porous media theory is used to model the blockage of fluid flow by columnar dendrites in the mushy zone. The relation between flow pattern and the shape of the solid shell is demonstrated. Double diffusive convection caused by thermal and concentration gradients is considered. The change in the liquidus temperature with liquid concentration is also considered. The formation mechanism of macrosegregation is investigated. Calculated solid shell thickness and temperature distribution in liquid core are compared with the measured quantities for validating the model.