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International Journal of Chemical Engineering
Volume 2014, Article ID 706149, 7 pages
http://dx.doi.org/10.1155/2014/706149
Research Article

CFD Simulation of the Discharge Flow from Standard Rushton Impeller

1Institute of Hydrodynamics AS CR, v. v. i., Pod Patankou 30/5, 166 12 Prague, Czech Republic
2Department of Process Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technicka 4, 166 07 Prague, Czech Republic

Received 5 August 2013; Revised 22 November 2013; Accepted 23 November 2013; Published 29 January 2014

Academic Editor: Alírio Rodrigues

Copyright © 2014 Bohuš Kysela et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The radial discharge jet from the standard Rushton turbine was investigated by the CFD calculations and compared with results from the Laser Doppler Anemometry (LDA) measurements. The Large Eddy Simulation (LES) approach was employed with Sliding Mesh (SM) model of the impeller motion. The obtained velocity profiles of the mean ensemble-averaged velocity and r.m.s. values of the fluctuating velocity were compared in several distances from the impeller blades. The calculated values of mean ensemble-averaged velocities are rather in good agreement with the measured ones as well as the derived power number from calculations. However, the values of fluctuating velocities are obviously lower from LES calculations than from LDA measurements.