#6457. Enhancement of turbulent liquid-liquid dispersions in a round-bottom stirred tank equipped by a flexible impeller

November 2026publication date
Proposal available till 25-05-2025
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Journal’s subject area:
Industrial and Manufacturing Engineering;
Chemical Engineering (all);
Energy Engineering and Power Technology;
Chemistry (all);
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Abstract:
Stirred tanks have been widely used for liquid-liquid mixing in the chemical industry. In the present work, the influences of flexible impeller on the hydrodynamic characteristics and droplet size distribution of oil in water dispersions were investigated using experimental and numerical approaches. The one-way Fluid Structural Interaction (FSI) analysis was carried out to model the geometry of the flexible impeller used in CFD simulations. Computational fluid dynamics (CFD) was coupled with the population balance model (PBM) to simulate the liquid-liquid dispersion process in the stirred tank. The numerical model was validated by the experimental results. Compared with the rigid impeller, the flexible impeller generates a more uniform distribution of turbulent kinetic energy and turbulent dissipate rate in the stirred tank. Compared with the case of rigid impeller, the region indicating the trailing vortices behind the impeller blades was significantly reduced by the flexible impeller.
Keywords:
CFD-PBM; Droplet size distribution; Flexible impeller; Liquid-liquid dispersion; Round-bottom stirred tank

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