CFD-DEM simulation of flow pattern and particle velocity in a fluidized bed with wet particles

2017 ◽  
Vol 314 ◽  
pp. 346-354 ◽  
Author(s):  
Chengxiao Song ◽  
Daoyin Liu ◽  
Jiliang Ma ◽  
Xiaoping Chen
Keyword(s):  
Flow Pattern ◽  
Fluidized Bed ◽  
Particle Velocity ◽  
Dem Simulation ◽  
Wet Particles

Effect of Pressure Drop of Distributor on Flow Pattern in 2-D Fluidized Bed: DEM Simulation and Experiment

2003 ◽  
Author(s):  
Toshihiro Kawaguchi ◽  
Yunosuke Mizushima ◽  
Toshitsugu Tanaka ◽  
Yutaka Tsuji
Keyword(s):  
Pressure Drop ◽  
Discrete Element Method ◽  
Flow Pattern ◽  
Fluidized Bed ◽  
Particle Motion ◽  
Fluidized Beds ◽  
Gas Flows ◽  
Dem Simulation ◽  
Effect Of Pressure ◽  
Simulation And Experiment

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 the distributor required to achieve uniform gas flows agreed well with previous empirical findings.

Solids Flow Pattern in the Bottom Zone of a Rectangular Cross-Section Circulating Fluidized Bed

2003 ◽  
Author(s):  
Hong-Shun Li ◽  
Yi-Jun Wang ◽  
Shi-Ping Jin
Keyword(s):  
Flow Pattern ◽  
Fluidized Bed ◽  
Cross Section ◽  
Quartz Sand ◽  
Circulating Fluidized Bed ◽  
Rectangular Cross Section ◽  
Temperature Response ◽  
Cold Model ◽  
Hot Particles ◽  
Bottom Zone

Solids flow pattern in the bottom zone of a rectangular cross-section CFB was investigated by using hot particles as the tracer. The experiments were carried out in a cold model circulating fluidized bed. The riser has an inner cross-section of 0.3 m by 0.5 m and a height of 5.8 m. The solids were returned into the riser at a height of 0.75 m above the air distributor within an angle of about 40 degree. Quartz sand was used as the bed material. The hot particles were also quartz sand but with a little smaller size. Specially designed miniature electrically heating devices were installed flush with the inner bed wall or inside the bed. At each run, about 10–15 cm3 hot particles were slowly pulled into the bed. The temperature response around the device was measured with four copper-constantan thermocouples. Based on the experimental results, a 3-D core-annulus model describing the solids flow pattern in the bottom zone of the CFB riser is proposed.

scholarly journals Estimative Model of Particle Flow Pattern in Fluidized Bed Based on Bubble Behavior.

1996 ◽  
Vol 22 (6) ◽  
pp. 1442-1449
Author(s):  
Nobusuke Kobayashi ◽  
Ryohei Yamazaki ◽  
Shigekatsu Mori
Keyword(s):  
Flow Pattern ◽  
Fluidized Bed ◽  
Particle Flow ◽  
Bubble Behavior

Jet Particle Velocity in a Jetting Fluidized Bed with Conical Distributor

1995 ◽  
pp. 661-668 ◽  
Author(s):  
J.C. Bi ◽  
H. Matsuo ◽  
S. Uemiya ◽  
T. Kojima
Keyword(s):  
Fluidized Bed ◽  
Particle Velocity

scholarly journals Development and assessment of speed-up algorithms for the reactive CFD–DEM simulation of fluidized bed reactors

2020 ◽  
Vol 5 (2) ◽  
pp. 278-288 ◽  
Author(s):  
Riccardo Uglietti ◽  
Mauro Bracconi ◽  
Matteo Maestri
Keyword(s):  
Fluidized Bed ◽  
Selection Procedure ◽  
Operating Conditions ◽  
Fluidized Bed Reactors ◽  
Effective Algorithm ◽  
Dem Simulation ◽  
Dem Simulations ◽  
Speed Up

PA and ISAT algorithms are developed to speed-up the CFD–DEM simulations of fluidized reactors. Also, a selection procedure of the most effective algorithm according to the operating conditions is developed, enabling the simulation of lab reactors.

Sign in / Sign up

Export Citation Format

Share Document