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以等价比热容法处理结晶潜热和以假设的流线边界划分网格节点,建立了双辊连铸薄带凝固过程的宏观速度场、传热、溶质传输和凝固组织形成的微观数学模型以及双辊连铸薄带凝固过程的宏观-微观耦合数学模型。同时,以固相率为媒介,采用宏微观不同的网格尺寸和时间步长,实现了宏观模型与微观模型的耦合,并对建立的双辊连铸薄带凝固组织形成的数学模型进行了验证。
The latent heat of crystallization was treated by the equivalent specific heat capacity method and the mesh nodes were divided by the hypothetical streamline boundary. The microscopic mathematical model of macroscopic velocity field, heat transfer, solute transport and the formation of solidified microstructure in the twin-roll continuous casting thin strip solidification process was established. Macroscopical - Microscopic Coupling Mathematical Model of the Solidification Process of Rolling Strip. At the same time, using the solid phase ratio as the medium, the macroscopic and microscopic models are coupled by using the macro and micro grid sizes and time steps. The mathematical model of the twin-roll continuous casting thin strip solidification structure is established verification.