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Turbulence properties of the impeller stream of a Rushton turbine
Author(s) -
Lee K. C.,
Yianneskis M.
Publication year - 1998
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690440104
Subject(s) - rushton turbine , turbulence , impeller , dissipation , mechanics , turbine , turbulence kinetic energy , k epsilon turbulence model , computational fluid dynamics , k omega turbulence model , turbine blade , physics , materials science , thermodynamics
The structure of the flow in a vessel stirred by a Rushton turbine was investigated using laser Doppler anemometry measurement techniques. The time and length scales of turbulence were determined and used to estimate the dissipation rate of turbulence energy. The levels of turbulence energy and dissipation are high near the turbine and decrease rapidly with increasing distance from the turbine blades. The turbulence in the impeller stream is mostly anisotropic close to the blades. The results are compared with the findings of earlier investigations, and their implications for computational fluid dynamics (CFD) predictions of the flows are discussed.