Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation
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 impell...
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Polish Academy of Sciences Committee of Chemical and Process Engineering
2016-09-01
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| Series: | Chemical and Process Engineering |
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| Online Access: | http://www.degruyter.com/view/j/cpe.2016.37.issue-3/cpe-2016-0037/cpe-2016-0037.xml?format=INT |
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| author | Stelmach Jacek Kuncewicz Czesław Musoski Radosław |
| author_facet | Stelmach Jacek Kuncewicz Czesław Musoski Radosław |
| author_sort | Stelmach Jacek |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-d94e0975847d475fa885c4890a64fb88 |
| institution | Kabale University |
| issn | 2300-1925 |
| language | English |
| publishDate | 2016-09-01 |
| publisher | Polish Academy of Sciences Committee of Chemical and Process Engineering |
| record_format | Article |
| series | Chemical and Process Engineering |
| spelling | doaj-art-d94e0975847d475fa885c4890a64fb882025-08-20T03:25:10ZengPolish Academy of Sciences Committee of Chemical and Process EngineeringChemical and Process Engineering2300-19252016-09-0137344145710.1515/cpe-2016-0037cpe-2016-0037Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operationStelmach Jacek0Kuncewicz Czesław1Musoski Radosław2Lodz University of Technology, Faculty of Process and Environmental Engineering, ul. Wólczańska 213, 90-924 Łódź, PolandLodz University of Technology, Faculty of Process and Environmental Engineering, ul. Wólczańska 213, 90-924 Łódź, PolandLodz University of Technology, Faculty of Process and Environmental Engineering, ul. Wólczańska 213, 90-924 Łódź, PolandFeasibility 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.http://www.degruyter.com/view/j/cpe.2016.37.issue-3/cpe-2016-0037/cpe-2016-0037.xml?format=INTself-aspirating impellerPIVgas bubble size distributionenergy dissipation rategas bubble sizes |
| spellingShingle | Stelmach Jacek Kuncewicz Czesław Musoski Radosław Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation Chemical and Process Engineering self-aspirating impeller PIV gas bubble size distribution energy dissipation rate gas bubble sizes |
| title | Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation |
| title_full | Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation |
| title_fullStr | Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation |
| title_full_unstemmed | Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation |
| title_short | Analysis of the mechanism of gas bubble break-up in liquids during the self-aspirating impeller operation |
| title_sort | analysis of the mechanism of gas bubble break up in liquids during the self aspirating impeller operation |
| topic | self-aspirating impeller PIV gas bubble size distribution energy dissipation rate gas bubble sizes |
| url | http://www.degruyter.com/view/j/cpe.2016.37.issue-3/cpe-2016-0037/cpe-2016-0037.xml?format=INT |
| work_keys_str_mv | AT stelmachjacek analysisofthemechanismofgasbubblebreakupinliquidsduringtheselfaspiratingimpelleroperation AT kuncewiczczesław analysisofthemechanismofgasbubblebreakupinliquidsduringtheselfaspiratingimpelleroperation AT musoskiradosław analysisofthemechanismofgasbubblebreakupinliquidsduringtheselfaspiratingimpelleroperation |