Oil particles move stochastically in the turbulent fluctuate flow filed on the action of radial and axial forces, and some of them are separated and escaped from the overflow tube.

• 油滴粒子在径向力、轴向力以及周围瑞流脉动流场的共同作用下作随机运动，部分粒子由溢流管排出而得到分离；