In this study, the numerical simulations are conducted for the bubble and particle dynamics in three-phase fluidization systems at elevated pressures. Paratherm NF heat transfer fluid, nitrogen, and glass beads are used as liquid, gas, and solid phases, respectively.
Particles then settle under gravity in the liquid medium with an evenly distributed inlet velocity.
The spherical bubble is treated as a stationary obstacle at this stage of the simulation. The memory required to run the code is 6 Mwords and about 20 hours of CPU time are required for the case presented here. The particles are shown against a colored background which represents the magnitude of the liquid velocity. The velocity gradient in the liquid and its relationship with the particle and bubble motion are cleary shown. As the bubble rises in the liquid-solid fluidized bed, the interaction between the bubble and particles takes place.