Based on some experimental investigations of liquid phase residence time distribution (RTD) in an impinging stream reactor, a two-dimensional plug-flow dispersion model for predicting the liquid phase RTD in the reactor was proposed. The calculation results of the model can be in good agreement with the experimental RTD under different operating conditions. The axial liquid dispersion coefficient increases monotonously with the increasing liquid flux, but is almost independent of gas flux. As the liquid flux and the gas flux increase, the liquid dispersion coefficient of center-to-wall decreases. The axial liquid dispersion coefficient is much larger than that of center-to-wall, which indicates that the liquid RTD is dominated mainly by axial liquid dispersion in the impinging stream reactor.

With the assumption of isothermal process, an efficient thermoviscoelastic difference model which has an extra advantage of using test data by dynamic thermomechanical anal ysis directly, has been developed to deal with thermomechanical coupling problems under steady-state cyclic loading conditions. By comparison, the assumption of isothermal process per circle is accurate enough for this model. This difference model is verified by experiments and shows a reasonable agreement with measured data.