Numerical Investigation of Mixing Time in a Torus Reactor

Abstract

In this work, the mixing performance in a batch torus reactor was investigated using computational fluid dynamics (CFD). To validate the numerical model, the CFD results for the mean bulk velocity and power number were compared with the experimental data reported in the literature. Next, by solving numerical dispersion of a passive tracer in unsteady state, the effects of important parameters such as the impeller type, impeller diameter, impeller blade angle and impeller rotation speed on the mixing time were explored. The analysis of numerical results allows us to suggest simple correlations for the prediction of the mixing time as a function of the total specific power consumption P/V, impeller diameter to reactor diameter ratio D/d and impeller blade angle sinφ.