The mean flow and turbulence structures of a mixing vessel stirred by a Rushton impeller with an impeller-to-bottom clearance C = 0.15 T was investigated. Ensemble-averaged LDA velocity measurements showed that the impeller stream is inclined at an angle of about 25° below the horizontal. The turbulence level distributions indicated that the turbulence in the impeller stream is anisotropic. Measurements of the velocities of the glass particles showed that, apart from minor differences such as the fact that the glass particles slightly lead the single-phase velocities in the impeller stream, the two mean flow fields as well as turbulent fluctuations were found to practically coincide, which gives important information for two-phase CFD simulations.
Montante G., Lee K.C. (1999). Liquid and solid particle mean flow and turbulence levels in a stirred vessel with low impeller clearance. SYMPOSIUM SERIES, 146(146), 305-316.
Liquid and solid particle mean flow and turbulence levels in a stirred vessel with low impeller clearance
Montante G.;
1999
Abstract
The mean flow and turbulence structures of a mixing vessel stirred by a Rushton impeller with an impeller-to-bottom clearance C = 0.15 T was investigated. Ensemble-averaged LDA velocity measurements showed that the impeller stream is inclined at an angle of about 25° below the horizontal. The turbulence level distributions indicated that the turbulence in the impeller stream is anisotropic. Measurements of the velocities of the glass particles showed that, apart from minor differences such as the fact that the glass particles slightly lead the single-phase velocities in the impeller stream, the two mean flow fields as well as turbulent fluctuations were found to practically coincide, which gives important information for two-phase CFD simulations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
