Detached Eddy Simulation of Turbulent Flow in Stirred Tank Reactor

Abstract

The difficulties associated with the use of the standard LES (Large Eddy Simulation) models, particularly in near-wall regions, has lead to the development of hybrid models that attempt to combine the best aspects of RANS (Reynolds Averaged Navier Stokes) and LES methodologies in a single solution strategy. An example of a hybrid technique is the detached-eddy simulation (DES). In this paper, application of DES model is made in the analysis of turbulent flow generated in impeller driven (Rushton Impeller) stirred tank reactor in order to understand the flow behavior especially around the impeller region and near the wall of the tank. The simulated result is compared with Experimental results of Wu and Patterson [1]. DES is found more accurate against the experimental result in predicting the turbulent flow of velocity profile than the LES model which ultimately increases its interest in turbulent flow analysis.