scholarly journals Numerical simulation of gas-solid flow in an interconnected fluidized bed

2015 ◽  
Vol 19 (1) ◽  
pp. 317-328 ◽  
Author(s):  
Giuseppe Canneto ◽  
Cesare Freda ◽  
Giacobbe Braccio
Keyword(s):  
Numerical Simulation ◽  
Fluidized Bed ◽  
Experimental Tests ◽  
Solid Particles ◽  
Multiphase Model ◽  
Cold Model ◽  
Conservation Equations ◽  
Solid Flow

The gas-particles flow in an interconnected bubbling fluidized cold model is simulated using a commercial CFD package by Ansys. Conservation equations of mass and momentum are solved using the Eulerian granular multiphase model. Bubbles formation and their paths are analyzed to investigate the behaviour of the bed at different gas velocities. Experimental tests, carried out by the cold model, are compared with simulation runs to study the fluidization quality and to estimate the circulation of solid particles in the bed.

Filtered model for the cold-model gas–solid flow in a large-scale MTO fluidized bed reactor

2016 ◽  
Vol 143 ◽  
pp. 369-383 ◽  
Author(s):  
Li-Tao Zhu ◽  
Le Xie ◽  
Jie Xiao ◽  
Zheng-Hong Luo
Keyword(s):  
Fluidized Bed ◽  
Large Scale ◽  
Fluidized Bed Reactor ◽  
Cold Model ◽  
Solid Flow

Numerical Simulation on the Preparation of Vinyl Acetate Catalyst in Fluidized Bed

2013 ◽  
Vol 750-752 ◽  
pp. 1704-1707
Author(s):  
Pan Zhang ◽  
Kun Cui ◽  
Ning Xu ◽  
Guang Jian Wang
Keyword(s):  
Activated Carbon ◽  
Fluidized Bed ◽  
Zinc Acetate ◽  
Volume Fraction ◽  
Hydrodynamic Characteristics ◽  
Multiphase Model ◽  
Carbon Catalyst ◽  
Solid Flow ◽  
Phase Volume Fraction ◽  
Mode Of Operation

Based on the preparation of zinc acetate/activated carbon catalyst in the fluidized bed reactor, the Eulerian multiphase model in Fluent was used to numerically simulate the gas-liquid-solid flow and the gas-solid-solid flow hydrodynamic characteristics in fluidized beds. The instantaneous phase volume fraction and the flow hydrodynamic characteristics of the three phases were analyzed, and in view of the zinc acetate/activated carbon catalyst with bad uniformity prepared by present method, a new mode of operation with dynamic rules was proposed. The simulation results show that activated carbon particles with different density can realize layer inversion using this mode of operation, and the uniformity of zinc acetate/activated carbon catalyst will be effectively improved.

Experiment and Numerical Simulation on Slugging Fluidization of Large Particles in Gas-Solid Fluidized Bed

2014 ◽  
Vol 881-883 ◽  
pp. 689-697
Author(s):  
Hui Yang ◽  
Dong Yu Wan ◽  
Chang Qing Cao
Keyword(s):  
Fluidized Bed ◽  
Expansion Ratio ◽  
Solid Particles ◽  
Momentum Exchange ◽  
Cold Model ◽  
State Behavior ◽  
Large Particles ◽  
Computational Fluid Dynamics Cfd ◽  
Bed Expansion

The hydrodynamics of a two-dimensional gas-solid fluidized bed with 0.03 m diameter and 0.3 m height were studied experimentally and computationally. The slugging fluidization of large particles was experimentally investigated and simulated using the Fluent 6.3 computational fluid dynamics (CFD) package. By a series of cold-model test, characterization of gas-solid fluidization with large particles was studied. These results can be used to research slugging characteristics. A multifluid Eulerian model incorporating the kinetic theory for solid particles was applied to simulate the unsteady-state behavior and momentum exchange coefficients were calculated by using the Syamlal-OBrien drag functions. These results of the transfer of fluidization state, maximum bed expansion ratio and pressure fluctuation were systemically simulated in a gas-solid fluidized bed. The modeling predictions compared reasonably well with experimental data and qualitative slugging regime. The simulation results can better predict the slugging fluidization characterization of large particles.

Numerical Simulation of the Gas−Solid Flow in Fluidized-Bed Polymerization Reactors

2010 ◽  
Vol 49 (9) ◽  
pp. 4070-4079 ◽  
Author(s):  
De-Pan Shi ◽  
Zheng-Hong Luo ◽  
An-Yi Guo
Keyword(s):  
Numerical Simulation ◽  
Fluidized Bed ◽  
Solid Flow
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