TY - JOUR N2 - The main topic of this study is the experimental measurement and mathematical modelling of global gas hold-up and bubble size distribution in an aerated stirred vessel using the population balance method. The air-water system consisted of a mixing tank of diameter T = 0.29 m, which was equipped with a six-bladed Rushton turbine. Calculations were performed with CFD software CFX 14.5. Turbulent quantities were predicted using the standard k-ε turbulence model. Coalescence and breakup of bubbles were modelled using the homogeneous MUSIG method with 24 bubble size groups. To achieve a better prediction of the turbulent quantities, simulations were performed with much finer meshes than those that have been adopted so far for bubble size distribution modelling. Several different drag coefficient correlations were implemented in the solver, and their influence on the results was studied. Turbulent drag correction to reduce the bubble slip velocity proved to be essential to achieve agreement of the simulated gas distribution with experiments. To model the disintegration of bubbles, the widely adopted breakup model by Luo & Svendsen was used. However, its applicability was questioned. L1 - http://journals.pan.pl/Content/84926/PDF/05-paper-Kalal.pdf L2 - http://journals.pan.pl/Content/84926 PY - 2014 IS - No 1 March EP - 73 DO - 10.2478/cpe-2014-0005 KW - CFD KW - mixing tank KW - gas-liquid KW - drag correction KW - bubble size distribution A1 - Kálal, Zbyněk A1 - Jahoda, Milan A1 - Fořt, Ivan PB - Polish Academy of Sciences Committee of Chemical and Process Engineering DA - 2014 T1 - CFD Prediction of Gas-Liquid Flow in an Aerated Stirred Vessel Using the Population Balance Model SP - 55 UR - http://journals.pan.pl/dlibra/publication/edition/84926 T2 - Chemical and Process Engineering ER -