Influences of operating parameters on the hydrodynamics of a 3-D spout–fluid bed based on DEM modeling approach

摘要: Abstract The influences of operating parameters on the gas–solid hydrodynamics a 3-D spout–fluid bed operated in flow regime Jet-In-Fluidization are numerically investigated at particle-scale level. gas motion and solid solved under frameworks computational fluid dynamics discrete element method, respectively. dynamical property phase obtained is compared with experimental data literature. Then, spouting velocity, background velocity particle diameter discussed. results show that vigorously lateral exists spout–annulus interface vertical transportation intensity larger than one. Increasing enlarges but decreases its concentration spout enhances circulating flux system. Meanwhile, enlargement gives rise to an obvious change voidage annulus. However, enlarging lowers three regions bed. Spout annulus interact each other through interface. boundary diverges initially, then keeps nearly constant, finally again until surface. Moreover, shape strongly influenced by inlet geometry. Along height, this influence diminishes initially enhanced vicinity or leads expansion along height. In contrast, increase reduces boundary.