The Kenics static mixer is anticipated to replace conventional extraction apparatuses because of its outstanding mass transfer performances and economy. The lack of a practicable mass transfer model limits its wide application. In this study, a three-dimensional liquid−liquid mass transfer model was developed for the Kenics static mixer while considering the dynamic droplet size distribution due to both interphase mass transfer and droplet breakage and coalescence. It has been proven to have good accuracy because of the mean relative errors between simulated and experimental results within 7%. Different hydrodynamic and mass transfer behaviors were found at different fluid velocities. The patterns thus presented were supported by other publications as an additional proof of the constructed model's accuracy. It was also found from the effect analysis on fluid velocity that the static mixer, even with few mixing elements (5) and at a low total inlet fluid velocity (0.7 m/s), can achieve excellent mass transfer performance.

This research aims to improve the method of Mini-pore Drilling superimposed an axis vibration for hard-to-cut material of Austenitic Stainless Steel 1Cr18Ni9Ti, as well as to make it easier for the chips to be discharged. A mathematical model of vibration drilling is presented, and the relationship between the vibration parameters and cutting parameters to generate little and short broken-chips in vibration drilling is investigated, analyzed and verified by experiments. The results show that when the processing parameters meet the conditions given in this article, stable and reliable chip-breaking can be achieved. The results provide a theoretical guidance to achieve chip-breaking in mini-pore vibration drilling for hard-to-cut material.

In this article, the vibration injection mold-filling is investigated by combining computer simulation with experiments. The material of the object is high density polyethylene (HDPE). For some of the experiments, a center-gated disk-shaped mold is designed independently using a cooperation with hydraulic pressure dynamic injection machine. The profiles of speed, pressure and temperature field can be obtained during vibration injection mold-filling. The results of the experiments and theories tend to be consistent, showing that the vibration field accelerates melt filling, enhances the properties of the molten fluid and reduces pressure drop during mold-filling, and the shear action impacted by the vibration field heats polymer melt.