Numerical Study of Stirred Tank with Multiphase System
Vondál, J.
Hájek, J.
Dohnal, M.
Download PDF

How to Cite

Vondál J., Hájek J., Dohnal M., 2015, Numerical Study of Stirred Tank with Multiphase System, Chemical Engineering Transactions, 45, 1051-1056.
Download PDF


The present work aims to develop a modelling approach for the simulation of multiphase stirred tank with floating particles, suitable for up-scaling studies. Multiphase numerical modeling is used for predicting velocity profiles in stirred liquid. Free surface is evaluated from gas-liquid phase interaction. Transient time is incorporated in simulation. Entire simulation is run in this mode. It includes impeller start-up phase from zero to the full speed. The methodology is demonstrated on a case of published stirred tank design previously analyzed by experimental methods. Scale-up of stirred tanks is a frequently faced problem, which is difficult in cases of multiphase systems, especially with floating particles. The methodology presented in this work is directly applicable in practical problems concerning the scale-up of such complex multiphase systems. Free surface effect on velocity profile and on drawn-down location of solids is presented. This is usually omitted and simplified as a flat surface.
Download PDF