Numerical modeling of influence of thermal flow coupling on flow characteristics of molten steel

Using the equation of continuity and the double equation of Navier-Stokes and k-ε,numerical modeling on a single outlet continuous casting tundish has been carried out during the process of non-thermal flow coupling.The flow field distribution inside the tundish was calculated and the viscosity response time was calculated with the mass transfer equation based on the flow field distribution.The flow characteristics of the molten steel inside the tundish were analyzed,with the results of the numerical modeling compared to the hydraulic modeling.The results showed that the Resident Time Distribution(RTD)curves in the latter anatomosed comparatively better.This certified the validity established by the mathematical model.Numerical modeling was carried out on both large and small tundishes during the processes of thermal flow coupling and also thermal non-flow coupling.The results showed that in regards to large tundishes with relatively simple flow processes,using numerical modeling for thermal flow coupling is necessary.