B. Sun et D. Gidaspow, Computation of circulating fluidized-bed riser flow for the fluidization VIII benchmark test, IND ENG RES, 38(3), 1999, pp. 787-792
Conservation of mass and momentum equations for the solid and for the gas p
hases was used to compute the hydrodynamics of flow of fluidized catalytic
cracking particles in a vertical pipe (riser) for the 1995 benchmark modeli
ng contest. The computer code predicted a new phenomenon: an off-center max
imum flux. The computed time-average radial fluxes and particle concentrati
ons agree with PSRI experimental data. The computer code also predicted the
observed core-annular flow regime. For the lowest gas velocity and highest
solids flux, the code predicted low-frequency, snakelike density oscillati
ons.