Advances in Multiscale Analysis of Impinging Stream Flow Field and Mixing Characteristics

Impinging stream reactor is widely used in chemical industry because of its enhanced heat and mass transfer characteristics. In this paper, the flow field characteristics of impinging stream reactor are summarized from the multi-scale point of view. On the macro scale, the turbulence characteristics and oscillation characteristics are summarized, and the influence of fluid flow characteristics on mixing is summarized; The micromixing characteristics of impinging stream reactor flow field are described from the perspective of micro scale, and the micromixing characteristic time of different types of reactors are summarized. The effects of structural parameters and external force field on micromixing in impinging stream reactor are emphatically described, and the mechanism of energy conversion affecting micromixing is revealed from the perspective of flow field energy. The effects of chaos and vortex characteristics on fluid mixing in the convective field and their mechanism are reviewed from the perspective of mesoscopic scale, and the enhanced reaction mechanism in the process of preparing ultrafine powder by impinging stream technology is described. Finally, the research prospect of developing new impinging stream reactor, optimizing process and realizing reactor industrialization by combining multi-scale method with impinging stream technology is prospected. © 2022, Science Press. All right reserved.