In this paper, numerical simulations of three dimensional gas-solid riser flow using in-house computational fluid dynamics code are carried out and evaluated. This study employs the two-fluid model approach using the kinetic theory of granular flow in numerical simulations. This research utilised Wen-Yu, Syamlal et al. and Gidaspow drag models to calculate the momentum interaction between gas and solid phase. The restitution coefficient of 0.7 and two different time-steps are run to analyse the hydrodynamics flow in the riser. The radial profile comparison between numerical and experimental results is examined regarding axial solid volume fraction, gas, and solid velocities. Using the time step of 0.00015 s, numerical simulation using Syamlal et al.’s drag model obtains a good agreement with the experimental result.
- computational fluid dynamics
- drag model
- gas-solid riser flow
- kinetic theory of granular flow
- two fluid model