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Hydrodynamics in a Stirred Square Tank Investigated Using a 3‐D PIV LES Decomposition Approach and LDA Measurements
Author(s) -
Kilander J.,
Rasmuson A.
Publication year - 2004
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.200401983
Subject(s) - particle image velocimetry , impeller , turbulence , mechanics , particle tracking velocimetry , velocimetry , physics , flow (mathematics) , large eddy simulation , dissipation , thermodynamics
In this study, the hydrodynamics and turbulence in a square tank stirred with the hydrofoil impeller Lightnin A310 is investigated using a large eddy particle image velocimetry approach. Particle image velocimetry data are used as the large scale part of a large eddy simulation and the small scales are modelled by direct calculation of the turbulent stress tensor using filtered particle image velocimetry data. The spatial distribution of the calculated dissipation rate showed agreement with previous work. The macro instabilities of the flow structure were investigated by means of spectral analysis. Low frequency phenomena separated from the mean flow were detected. The cause of these could partly be explained by the circulation time for the tank.