Gas-solid two phase flow simulation in rectangular riser

The numerical studies of gas-solid two phase flow in a rectangular riser are carried out and evaluated. Eulerian-Eulerian approach using kinetic theory of granular flow is utilised in the simulation. Syamlal et al. drag model is utilised to calculate the energy exchange between gas and solid phase. Radial distribution model of Syamlal et al. and the restitution coefficient of 0.7 are used to predict the hydrodynamics flow in the riser. The simulation is carried out from 0 s to 40 s using time steps of 0.00015 s and on a single computer. The comparisons of numerical results with experimental data are made using lateral profiles of the solid phase velocity and the gas volume fraction. The simulation result overestimates the experimental value due to the coarse nature of the grid and probably due to uncertainties of the inlet flow properties.