In the framework of the two-fluid model, the kinetic theory of cohesive particle flow is applied to bicomponent cohesive particle flow. Based on the Bell particle-particle drag model, the revised Bell particle-particle drag model is presented for the bicomponent cohesive particle flow, considering the impact of the particle surface energy on the collision process. The flow characteristics of a mixture of Geldart group A particles and ultrafine particles were studied. The results show that the simulated elutriation rate is in good agreement with the experimental data, which verifies the effectiveness of the cohesive particles drag model.

In order to improve the separation efficiency of the large scale industrial cyclone separation filter, a new cyclone separator is designed which combines the principle of inertia separation and centrifugal separation. Based on the theory of particle dynamics, a two fluid model is established, which is used to numerically simulate the gassolid flow characteristics in the cyclone separator. The variation law of fluid velocity, particle trajectory and other parameters is analyzed. The results show that the separation efficiency of the new cyclone separator is improved compared with the traditional cyclone separator.

为了提高旋风分离器的工作性能,将在新型惯性分离器和普通旋风分离器的基础上进行优化,将新型惯性分离器具有的惯性分离原理和普通旋风分离器具有的离心分离原理结合在一起设计出一种新型旋风分离器.本次设计将在计算机数值模拟技术背景下展开研究和应用,使用FLUENT软件对新型旋风分离器内部的流场进行模拟计算和可视化,对颗粒在新型旋风分离器内部运动的轨迹进行追踪,通过计算机模拟技术给出新型旋风分离器对于不同密度下的不同直径的颗粒所表现出的分离效率.