Multiscale analysis of microscale three-phase flow by combined PIV

利用可视化技术研究了微气泡和小颗粒诱导的微尺度三相流的结构。特别研究了不同比重的小颗粒对气相流动的影响。三相流动中气相的平均动能明显低于仅有微气泡的流动。这是由于小颗粒对气泡羽流相互作用的显著抑制。此外，三相流中气相的平均动能强烈地依赖于小颗粒的比重。

We use visualization to investigate the structure of the microscale three-phase flow induced by microbubbles and small particles. In particular, we study the effect of small particles with different specific gravities on the gas-phase flow. The mean kinetic energy of the gas-phase is significantly lower in the three-phase flow than in the flow with only microbubbles. This results from ignificant suppression of the interaction of bubble plumes by the small particles. Moreover, the mean kinetic energy of the gas-phase in the three-phase flow is strongly dependent on the specific gravity of the small particles