Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation

• Autorzy: Stelmach J. , Kuncewicz Cz. , Musoski R.

Identyfikatory

DOI

10.1515/cpe-2016-0037

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

self-aspirating impeller; PIV; gas bubble size distribution; energy dissipation rate; gas bubble sizes

PL

PIV; pęcherzyk gazu; rozpraszanie energii

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2016
• Tom: Vol. 37, nr 3
• Strony: 441--457
• Opis fizyczny: Bibliogr. 39 poz., rys., wykr.

Twórcy

autor

Stelmach J.

• Lodz University of Technology, Faculty of Process and Environmental Engineering, ul. Wólczańska 213, 90-924 Łódź, Poland

autor

Kuncewicz Cz.

• Lodz University of Technology, Faculty of Process and Environmental Engineering, ul. Wólczańska 213, 90-924 Łódź, Poland

autor

Musoski R.

• Lodz University of Technology, Faculty of Process and Environmental Engineering, ul. Wólczańska 213, 90-924 Łódź, Poland

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