关键词: 声共振混合, 振动, 多相流, 混合, 数值模拟

Abstract: Resonance acoustic mixing is a new method to solve the problem of uniform dispersion of the force/heat sensitive ultra-fine materials. The technical feature of this technology is that the mixing vessel is working in a resonant state and uses a vibration at a frequency less 200Hz to produce a low frequency sound field to promote mixing. In this paper,a solid-liquid three-phase flow model was used to model the mixing process of a solid liquid in an acoustic resonant mixing vessel. The interaction coefficient between solid particles and liquid is Gidaspow's formula. The mixing uniformity was evaluated by using the standard deviation of the volume fraction of solid particles. The results showed that the bulk flow phenomenon occurred in the vessel with 100g vibration acceleration,and the mixing characteristics under different aspect ratios and different excitation parameters were calculated. The calculation results were analyzed. Finally,the experiments were carried out under low and high solid volume fractions,and the tracks of solid particles in the mixing process were recorded. The experimental results verify the correctness of the simulation and the mixing ability of the resonant acoustic mixing prototype.

Key words: resonant acoustic mixing, vibration, multiphase flow, mixing, numerical simulation