We demonstrate that a fluidized bed of hard spheres during defluidization displays properties associated with formation of a glass. The final state is rate dependent, and as this state is approached, the bed exhibits heterogeneity with increasing time and length scales. The formation of a glass results in the arrest of macroscopic particle motion and thus the loss of fluidization. Microscopic m...

We demonstrate that a fluidized bed of hard spheres undergoes a glass transition during defluidization. As in other glass-forming systems, the dynamics of the bed becomes heterogeneous as the transition is approached; spatial and temporal correlation scales increase rapidly. Microscopic motion persists in the glass state, but the bed can be jammed (all motion arrested) by application of a small...

Drying of green peas in a Fluidized Bed Dryer (FBD) with inert particle, heated by combined sources of hot air and InfraRed (IR) radiation, has been experimentally and theoretically studied. For this purpose, an experimental set up was constructed. This setup was composed of a cylindrical bed dryer containing some inert particles which are fluidized by hot air. Some infrared lamps were also pla...

Fluidized beds have been widely used in power generation and in the chemical, biochemical, and petroleum industries. The 3D simulation of commercial scale fluidized beds has been computationally impractical due to the required memory and processor speeds. However, in this study, 3D Computational Fluid Dynamics simulation of a gas-solid bubbling fluidized bed is performed to investigate the effe...

Ž . In this study, the rapid expansion of supercritical fluid solution RESS process was employed for the coating granulation of fine particles in a fluidized bed and its mechanism was examined. The rapid expansion of the supercritical solution causes very high supersaturating ratio of solute in the spraying flow, forming a large number of superfine nuclei. The superfine nuclei deposited on the ...

The hydrodynamics in a 152 mm ID bubbling fluidized bed filled with 500-600 μm glass beads have been simulated using the computational fluid dynamics (CFD) code Fluent 6.3, and the results are compared to experimental data obtained using pressure measurements and 3D X-ray computed tomography. The grids in a Cartesian coordinate system used in simulations are made by 2D (8×8 mm, 4×4 mm, 2×2 mm, ...