在Euler(流场)--Lagrange(颗粒)框架下,提出了一个夹杂物运动、聚合和去除耦合的统计模型. 运用此模型数值计算了连铸中间包的三维流场, 对夹杂物的行为进行了Monte--Carlo模拟. 计算结果显示, 20, 40和60 um夹杂物的总去除效率约为20%, 36%和75%, 其中壁面吸附的贡献占1/6---1/4. 受中间包实际条件的限制, 夹杂物的碰撞长大并不显著.
Combing Euler framework for flow fluid and Larangian framework for particle motion, a statistic model coupling the motion, coalescence and removal of inclusion in molten melts has been developed to interpret the basic behavior of inclusion in continuous casting tundish. Numerical calculation was conducted for 3D turbulent flow field using turbulence model, then the removal efficiencies and growth rate of inclusion were statistically computed based on the random--trajectory model. The results indicate that the total removal efficiencies of 10, 20 and 30um inclusion are approximately 20%, 36% and 75% respectively, of which the attribution due to adhesion to the refractory of inclusion occupies 1/6--1/4. It is found that the growth of inclusion due to coalescence is not marked, restricted by the realistic condition in tundish.
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