科研之友
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摘要
Steady 3-D flow of steel in the liquid pool in the mold and upper strand is simulated with a finite difference computational model using the standard k-e turbulence model Trajectories of inclusions are calculated by integrating local velocity, considering its drag and buoyancy forces. A "random walk" model is used to incorporate the effect of turbulent fluctuations on the particle motion. The attachment probability of inclusions on the nozzle wall is investigated based on fundamental fluid flow simulation, incorporating the turbulent inclusion trajectory. The fluid flow, nozzle outport jet characteristic, top-surface lever fluctuation, heat transfer has been investigated under different conditions. Effect of injection locations, diameter of inclusions and casting speed on entrapment probability on the narrow wall are calculated by the means of simulation. The results are compared to previous ones which were obtained by the means of mathematic model.
