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Paper Details

A CFD based study of turbulence energy dissipation in mixing vessel

Kumar Verma and Amit Keshav*

Journal Title:Journal of Chemical, Biological and physical sciences

The distribution of rate of energy dissipation in the stirred vessel, stirred by a Rushton Impeller has been obtained from CFD predictions of the flow employing moving reference frame (MRF) approach and RANS based turbulence model (standard k- ?). In a stirred tank, flow around the rotating impeller blades interacts with the stationary baffles and generates a complex, three-dimensional, recirculating turbulent flow. The CFD simulations are performed in a 3D domain using commercial code FLUENT. The simulation is conducted to get normalized radial pumping capacity (NRPC) profile, turbulent kinetic energy and normalized turbulent dissipation rate. The numerical predictions are found to be within - 8.5% of error when compared with the experimental data. The present CFD result also indicates that a substantial amount of energy might be dissipated in the bulk of the flow and near the wall of baffles.