立式辊磨, 两相流, 气固耦合, 湍流

Mixture multiphase flow model and the Reynolds stress equation eddy viscosity model (RSM) of the chamber were used to simulate numerically internal special multiphase flow of HRM4800 chamber to analyze the powder transportation. The results show that under influence of the rotation of table and rollers, there is special three dimensional rotation flow field in the powder transportation and visible turbulent flow in the chamber. The gas-solid turbulent multiphase flow field has active local asymmetry and the turbulent pulsation. Especially，there are visible turbulent eddies in the flow field between table and rollers. It indicates the relation between flow boundary and turbulence. The high-speed flow flied is formed in the reduction flow field between table and chamber and profits the powder transportation. In the special flow field there is wall turbulent flow which has linear average velocity characteristics consistent with the legal theory of wall turbulence.