... Abstract This work concerns with numerical simulation of dense gas-particle two-phase flow in a fluidized bed in the framework of two-fluid model, where attention is given to the bubble formation in a single-jet and multi-jet fluidized beds. The kinetic theory is implemented in the model...

... Fluidized beds are used in a variety of process industries because they provide uniform temperature distributions, low pressure drops, and high heat/mass rates. Minimum fluidization velocity is an important factor in understanding the hydrodynamic behavior of fluidized beds...

... An experimental 2-D fluidized bed was developed to study gas-solid hydrodynamics. The effects of multiple jet systems were examined using Particle Image Velocimetry (PIV) combined with Digital Image Analysis (DIA). Flow regimes were classified through pressure drop spectral analysis...

... Characterizing the hydrodynamics of a fluidized bed is of vital importance to understand the behavior of these multiphase flow systems. Minimum fluidization velocity and gas holdup are two important factors used to understand the hydrodynamics of a fluidized bed. Experimental studies...

... Fluidized beds are being used in practice to gasify biomass to create producer gas, a flammable gas that can be used for process heating. However, recent literature has identified the need to better understand and characterize biomass fluidization hydrodynamics, and computational fluid dynamics...

... Fluidized bed technology can be used for pyrolysis and gasification of solid fuel particles such as biomass, which is important to industry because of its potential as an alternative for petroleum-based fuels. To efficiently utilize a fluidized bed reactor it is necessary, among other factors...

... 30 07 2010 Characterizing the hydrodynamics in fluidized beds is important to many processes from producing biofuels to coating pharmaceuticals. X-ray computed tomography (CT) can quantify local time-averaged phase fractions in multiphase systems that are highly dynamic, like fluidized...

... 30 07 2010 Fluidized beds are commonly found in the chemical and energy processing industries because of their low pressure drop, uniform temperature distribution, and high heat transfer rates. For example, in biomass gasification, biomass particles are injected into a heated bubbling...

... 30 07 2010 Fluidized beds are used to gasify materials such as coal or biomass in the production of producer gas. Modeling these reactors using computational fluid dynamics is advantageous when performing parametric studies for design and scale-up. While two-dimensional simulations...

... 10 07 2009 Fluidized beds can be used to gasify biomass in the production of producer gas, a flammable gas that can replace natural gas in process heating. Knowing how the fluidized bed hydrodynamics vary as reactor dimensions are scaled up is vital for improving reactor efficiency...

... 26 03 2009 This paper presents a numerical study of segregation of binary mixtures of particles in a gas fluidized bed (floatsam = 1 mm, jetsam = 2 mm in diameter). The well-mixed packing has been used as the initial condition in this simulation. Simulations are conducted under 3D...

... 03 03 2009 Fluidized bed freeze concentration is a technology in which liquid solutions can be concentrated within a fluidized bed heat exchanger by preferential freezing of water out of the solution. Water forms an ice layer on the heat exchanger wall from where it is removed...

..., but also the potential role of such computer systems in industrial fluid-particle flow simulations. Fluid-Particle System Fluidized Bed Discrete Element Method (DEM) Computational Fluid Dynamics (CFD) Parallel Computing Parallel Algorithm Proceedings of HTFED 2004 ASME Heat Transfer/Fluids...

... 05 02 2009 In the present study, effects of pressure drop across a distributor on particle motion in fluidized beds are studied numerically and empirically. The discrete element method (DEM) is employed to calculate the motion of individual particle. The predicted pressure drop across...

... a secondary pressure correction for correcting the pressure field. Numerical calculations of gas-solid flow in a fluidized bed suggest that this method can accelerate convergence, improve accuracy and save CPU time, compared to the SIMPLE method. SIMPLE algorithm incompressible flow two-phase flow...