An Approach of Coupled KTGF of Euler Granular Phase and DEM of Lagrangian Discrete Particles Applied to Gas-Solid Fluidized Beds

摘要

An approach of coupled kinetic theory of granular flow (KTGF) for Euler granular phase,discrete element method (DEM) for Lagrangian discrete particles phase and turbulent model for Euler gas phase is proposed in a gas-particles fluidized bed.The coefficients of restitution (CoR) of KTGF are determined from the motion of discrete particles using DEM.The velocities of Euler gas phase,Euler granular phase and Lagrangian discrete partic les phase are predicted in a fluidized bed.The simulated axial velocities of Euler granular pages and Lagrangian discrete particles phase are in agreement with experiments in a center gas jet fluidized bed.A cluster structure-dependent (DCSDCSD) drag model is proposed to improve drag predictions for heterogeneous gas gas-solid flows in risers risers.The DCSD drag model is verified by CFD simulations in a riserriser.