Comparison of Large Eddy Simulations and κ-ε Modelling of Fluid Velocity and Tracer Concentration in Impinging Jet Mixers

Simulations of turbulent mixing in two types of jet mixers were carried out using two CFD models, large eddy simulation and κ-ε model. Modelling approaches were compared with experimental data obtained by the application of particle image velocimetry and planar laser-induced fluorescence methods. Me...

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Bibliographic Details
Published in:Chemical and Process Engineering 2015-06, Vol.36 (2), p.251-262
Main Authors: Wojtas, Krzysztof, Orciuch, Wojciech, Makowski, Łukasz
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Fluid flow
Inhomogeneity
jet mixers
Large eddy simulation
LES
Mathematical models
Measurement methods
Mixers
mixing
Particle image velocimetry
PIV
Planar laser induced fluorescence
PLIF
Reynolds number
Simulation
Turbulence
Turbulent mixing
Velocity measurement
Vortices
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Summary:Simulations of turbulent mixing in two types of jet mixers were carried out using two CFD models, large eddy simulation and κ-ε model. Modelling approaches were compared with experimental data obtained by the application of particle image velocimetry and planar laser-induced fluorescence methods. Measured local microstructures of fluid velocity and inert tracer concentration can be used for direct validation of numerical simulations. Presented results show that for higher tested values of jet Reynolds number both models are in good agreement with the experiments. Differences between models were observed for lower Reynolds numbers when the effects of large scale inhomogeneity are important.
ISSN:2300-1925
0208-6425
2300-1925
DOI:10.1515/cpe-2015-0017