Modelling of the Turbulent Wall Jet Generated by a Pitched Blade Turbine Impeller

CFD modelling results are presented for a fiat-bottomed tank with a pitched blade turbine impeller and four baffles. Six turbulence models, i.e. the standard k–ɛ, the RNG k–ɛ, the realizable k–ɛ, the Chen-Kim k–ɛ, the optimized Chen–Kim k–ɛ and the Reynolds stress model were used in the modelling. T...

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Bibliographic Details
Published in:Chemical engineering research & design 2002-11, Vol.80 (8), p.846-854
Main Authors: Jaworski, Z., Zakrzewska, B.
Format: Article
Language:English
Subjects:
CFD
flow modelling
pitched blade turbine
wall jet
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Summary:CFD modelling results are presented for a fiat-bottomed tank with a pitched blade turbine impeller and four baffles. Six turbulence models, i.e. the standard k–ɛ, the RNG k–ɛ, the realizable k–ɛ, the Chen-Kim k–ɛ, the optimized Chen–Kim k–ɛ and the Reynolds stress model were used in the modelling. The simulated values of the tangential and axial mean velocity components along with the kinetic energy of turbulence were compared for the wall jet region with the corresponding experimental data from LDA. The best results were obtained for the standard k–ɛ model with a good accuracy for the mean velocity and a significant underprediction of the turbulent kinetic energy.
ISSN:0263-8762
DOI:10.1205/026387602321143381