Numerical simulation on flow and heat transfer in twin roll strip casting and rolling molten pool with side dams vibrating

Abstract

A three-demensional numerical model is established to predict the free surface, the temperature field, the flow field, the turbulent kinectic energy, the outlet temperature, and the liquid fraction in the twin roll strip casting and rolling molten pool with side dams vibrating. The numerical simulations are also conducted to compare the flow and heat transfer characteristics under different vibration frequencies and different casting temperatures. The results show that the heat transfer is enhanced, the mixing of solutes is optimized, the strip outlet temperatures are homogeniazed, the kiss lines are higher, and the rolling intervals are extended as the frequency increased. Excessive casting temperature leads some unexpected problems such as liquid steel leakage and unformed strips. It also makes the height of kiss line uneven. Lower casting temperature leads the strip outlet temperature more uniform. It also leads the kiss lines higher. Finally, a new approach to advancing the development of twin roll strip casting and rolling is proposed through these analyses.