CFD-modeling of effects of draft tubes on operating condition in spouted beds

Draft tubes are used to increase performance in spouted beds. Performance of these tubes depends on its geometry and location. We can by surveying and CFD modeling of bed provide the best condition. In this work a CFD modeling technique is used to optimize draft tube geometry. First, model accuracy was assessed by comparing the results with experimental results. After it became clear that the model works, it was used to optimize the designing of spouted bed. The Eulerian-Eulerian multifluid modeling approach was applied to predict gas-solid flow behavior. The results present that optirnized selection of draft tubes lead to uniform distribution of particle velocity and it can increase also particles circulating. (C) 2012 Elsevier Inc. All rights reserved.