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Numerical determination of the three‐dimensional velocity distribution in a baffled pitched blade impeller stirred vessel
Author(s) -
Götz Sven,
Sperling Reinhard,
Liepe Friedrich,
Jembere Solomon
Publication year - 1997
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270200905
Subject(s) - impeller , mechanics , lift (data mining) , slip factor , blade (archaeology) , drag , control volume , work (physics) , flow (mathematics) , laser doppler velocimetry , materials science , physics , mechanical engineering , engineering , computer science , medicine , blood flow , data mining
The objective of the work presented here was the development of a method of modeling the effect of an impeller on the velocity distribution in a stirred vessel. The developed model makes it possible to numerically investigate the flow field almost independently of any experimental data. The starting point was a force balance around an impeller blade, which took into consideration the lift and drag forces. The obtained volume forces were circumferentially averaged in the impeller region. The calculations were carried out time‐averaged for the case of a pitched blade impeller. The results were compared with experimental data which were obtained by laser Doppler anemometry. The comparison of the axial velocity components shows a good agreement between numerical and experimental data. Furthermore some characteristic integral values were calculated, which demonstrate the efficiency of the impeller.