Hydrodynamics of a Radially Discharging Impeller Stream in Agitated Vessels

Abstract

A tangential jet model describing the high speed turbine impeller stream in agitated baflled vessels is critically reviewed. The application of the swirling radial jet model is treated in detail. This application means the replacement of a radially discharging impeller by an equivalent circumference-point-source of momentum flux with definite parameters (location, radius, direction and momentum flux rate of outflow). These parameters appearing in the flow field description have clear physical meaning and are approximated by mixing parameters. Hence, a radial impeller geometry is characterized by the introduced parameters with respect to the generated jet flow. A good agreement was found between the theoretical and the experimental data of this work and of other investigators.

Semianalytical characterization of turbulence from radial impellers, with experimental and numerical validation

“…This concept was further developed with time and has been applied for complex geometries such as stirred tanks . However, most of the models predict only the velocity field (e.g., the swirling‐radial‐jet model). In 1991, the swirling‐radial‐jet model was extended numerically to provide the and turbulent parameters as well .…”

CFD Simulation of the Discharge Flow from Standard Rushton Impeller

“…However, all calculations also need some validation by the experimental results or by the analytical models. The radial impellers are most often used in experiments and calculations [16][17][18][19][20][21], namely, Rushton turbine, and there are also analytical models, where the impeller discharge stream is modeled as a turbulent jet [1,2,16,19,20].…”