The removal of inclusions is of great importance in metallurgical industry. In this paper, a novel swirling flow generator (SFG) is intended to be installed around the inlet of the submerge entry nozzle (SEN) in the tundish to generate a swirling flow in the SEN by utilizing gravitational potential energy. Herein, the motion and interaction between bubbles and inclusion particles in the swirling flow field are simulated by Discrete Phase Model (DPM) in the three-phase fluid flow. In the swirling flow, collision between the inclusions particles and bubbles is governed by a self-developed User-Defined Function (UDF) program. The radial pressure gradient force causes inclusion particles to move toward the center. In the central area in the SEN, the collision rate between inclusion particles and bubbles increases significantly. Thus, bubble injection in swirling flow is beneficial to the removal of inclusion particles. The removal efficiency of inclusion particles of various sizes in tundish with SFG is investigated in this paper, which is valuable for the design of the industrial tundish.

夹杂物的去除在冶金工业中具有重要意义。本文拟在中间包浸入式水口（SEN）入口周围安装一种新型旋流发生器（SFG），利用重力势能在SEN中产生旋流。本文采用离散相模型（Discrete Phase Model，DPM）模拟了三相流体流动中气泡和夹杂物颗粒在旋流场中的运动和相互作用。在涡流中，夹杂物颗粒与气泡之间的碰撞由自主开发的用户定义函数（UDF）程序控制。径向压力梯度力导致夹杂物颗粒向中心移动。在 SEN 的中心区域，夹杂物颗粒与气泡的碰撞率显着增加。因此，旋流中的气泡注入有利于夹杂物颗粒的去除。本文研究了SFG对中间包中各种尺寸夹杂物颗粒的去除效率，对工业中间包的设计具有参考价值。