Computational modeling of gas-particle flow in a vertical riser - kinetic theory approach of granular flow

Solid velocity, particle concentration and solid viscosity are computed in a vertical riser using a two-phase computational fluid dynamic model combination with the solid turbulence kinetic energy model based on the kinetic theory of granular flow (KTGF) and SGS (Subgrid scale) turbulence model for gas phase. The model predicts a core-annular flow structure in a riser, similar to that found experimentally. The time-averaged model predictions agree well with the experimental data of Miller and Gidaspow (1992).