广义流体的概念在金属流动凝固传热分析模型中的应用

THE APPLICATION OF GENERALIZED FLUID CONCEPT IN FLOW AND HEAT TRANSFER ANALYSIS MODEL OF CONTINUOUS CASTING

应用广义流体的概念，以双辊连续铸轧工艺中金属流动凝固传热现象为例，将熔池内三种状态（液相、固相和固液两相）金属流动传热过程用统一的控制方程描述。典型算例表明：熔池内存在大面积的环形流动区域，环形流动产生的搅拌效应，可以促进熔池内钢水温度与化学成分的均化，提高薄带的质量。最后，计算结果与理论分析进行了比较。该计算思想还可应用于冶金。

Twin roll continuous strip casting process has been simulated by using generalized fluid concept based on considerations of fluid fl ow, heat transfer and solidification. The simulation result shows that there is a relatively large range of circumfluent area in the pool, which acts as the mec hanical agitator. This conclusion provides a theoretical foundation for twin ro ll casting to produce high quality strip. The method proposed can be used in var ious fields where the conjugate of solidification heat transfer and fluid flow i s dominant, such as metallurgy and petroleum engineering.