Numerical simulation of the motion behavior of inclusion in rotating flow field
In metallurgy centrifugal tundish and swirling nozzle,inclusions are aggregated by rotating molten steel,which is beneficial to the removal of inclusions in molten steel. In order to study the aggregation mechanism of inclusions in swirling flow field,a particle movement model based on Eulerian-Lagrangian method was established,and the movement behavior of single inclusion particles in swirling flow field was numerically simulated. The results show that the inclusions in the swirl flow field have stable equilibrium orbits under the action of various forces and inertia. When the particle size of inclusions is 50μm and 100μm,the Stokes number is much less than 1,and the inclusions move closely with the molten steel;When the particle size of inclusions is 200μm and 500μm,the flow behavior of inclusions is poor,and the larger the particle size,the smaller the equilibrium orbit radius re . When the density ratio of inclusions to molten steelρp/ρdecreases from 0.63 to 0.55,0.47 and 0.38,re decreases by 46.5％,33.3％,and 2.23％accordingly. In the swirl speed range of 5.24～11.51 rad/s,the re decreases by 1.30％,2.35％ and 27.2％ when the swirl speed increases by 2.09 rad/s.
inclusionrotating flow fieldforce on particleequilibrium orbitalEulerian-Lagrangian method
万方数据
维普
