TY - JOUR N2 - Feasibility of a model of gas bubble break-up and coalescence in an air-lift column enabling determination of bubble size distributions in a mixer with a self-aspirating impeller has been attempted in this paper. According to velocity measurements made by the PIV method with a self-aspirating impeller and Smagorinski’s model, the spatial distribution of turbulent energy dissipation rate close to the impeller was determined. This allowed to positively verify the dependence of gas bubble velocity used in the model, in relation to turbulent energy dissipation rate. Furthermore, the range of the eddy sizes capable of breaking up the gas bubbles was determined. The verified model was found to be greatly useful, but because of the simplifying assumptions some discrepancies of experimental and model results were observed. L1 - http://www.czasopisma.pan.pl/Content/85207/PDF/11-paper-Stelmach.pdf L2 - http://www.czasopisma.pan.pl/Content/85207 PY - 2016 IS - No 3 September EP - 457 DO - 10.1515/cpe-2016-0037 KW - self-aspirating impeller KW - PIV KW - gas bubble size distribution KW - energy dissipation rate KW - gas bubble sizes A1 - Stelmach, Jacek A1 - Kuncewicz, Czesław A1 - Musoski, Radosław PB - Polish Academy of Sciences Committee of Chemical and Process Engineering VL - vol. 37 DA - 2016 T1 - Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation SP - 441 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/85207 T2 - Chemical and Process Engineering ER -