Research progress of the characteristics of instantaneous flow in static mixer with twisted-leaves

This paper first summarized the features of static mixing technology.The recent progress of researches on statistical characteristics of pressure fluctuation signals(PFS) and velocity field,multi-fractal,and chaotic mixing,were mainly described.The experiment results showed that the relationship between the maximums of pressure fluctuations and the inlet flow rates can be described by a quadric equation and the power amplitude follows power-law attenuation as the frequency increased.The chaotic advection were generated and field synergy between velocity and temperature gradient can be effectively improved by the coupled secondary flow derived from the free vortex in the internal wall and the forced vortex in the bulk zones.In the end,the intensification impacts of flow division,flow reversal and radial mixing of the twisted-leaves in the static mixer on formation of CO2 hydrate were summarized as well.Finally,the mixing mechanism of the multiphase fluid in the static mixer could be further interpreted based on the integration of CFD,mapping approach and LIF,PIV,PFS tools.