Hamed Khosravi Bizhaem - PhD Candidate of Mechanical Engineering, Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran.
Hassan Basirat Tabrizi - Professor of Mechanical Engineering, Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran.

Numerical simulation of dense gas-solid flow in a spoutfluidized bed with draft plates was carried out using theEulerian-Eulerian multi-fluid approach incorporating thekinetic theory of granular flow (KTGF). To save thecomputational time, simulation was performed in twodimensionalframework. Different values of specularitycoefficient, which is important parameter of particle-wallboundary condition in, rang of 0.0001 to 0.1, were used.Numerical results show that by increasing the specularitycoefficient, time-averaged particle flux increases in spoutregion and decreases in annulus region. The best agreementof solid axial velocity with experimental data was achievedfor specularity coefficient equal to 0.03.

Spout fluidized bed - specularity coefficient -gas-solid flow - multi-fluid model