CFD-DEM simulation of fluidized bed with an immersed tube using a coarse-grain model

2021 ◽  
Vol 231 ◽  
pp. 116290
Author(s):  
Lianyong Zhou ◽  
Yongzhi Zhao
Keyword(s):  
Fluidized Bed ◽  
Coarse Grain ◽  
Dem Simulation ◽  
Grain Model

Biomass steam gasification in bubbling fluidized bed for higher-H2 syngas: CFD simulation with coarse grain model

2019 ◽  
Vol 44 (13) ◽  
pp. 6448-6460 ◽  
Author(s):  
Tian Qi ◽  
Tingzhou Lei ◽  
Beibei Yan ◽  
Guanyi Chen ◽  
Zhongshan Li ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Cfd Simulation ◽  
Steam Gasification ◽  
Coarse Grain ◽  
Bubbling Fluidized Bed ◽  
Grain Model

Verification and validation of a coarse grain model of the DEM in a bubbling fluidized bed

2014 ◽  
Vol 244 ◽  
pp. 33-43 ◽  
Author(s):  
Mikio Sakai ◽  
Minami Abe ◽  
Yusuke Shigeto ◽  
Shin Mizutani ◽  
Hiroyuki Takahashi ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Verification And Validation ◽  
Coarse Grain ◽  
Bubbling Fluidized Bed ◽  
Grain Model

Coarse grain 3D CFD-DEM simulation and validation with capacitance probe measurements in a circulating fluidized bed

2019 ◽  
Vol 196 ◽  
pp. 37-53 ◽  
Author(s):  
Alexander Stroh ◽  
Alexander Daikeler ◽  
Markku Nikku ◽  
Jan May ◽  
Falah Alobaid ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Coarse Grain ◽  
Dem Simulation ◽  
Capacitance Probe ◽  
Probe Measurements ◽  
Simulation And Validation

scholarly journals Development of Simpler Coarse-Grain Model for Analyzing Behavior of Particles in Fluid Flow

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1098
Author(s):  
Kizuku Kushimoto ◽  
Kaya Suzuki ◽  
Shingo Ishihara ◽  
Rikio Soda ◽  
Kimihiro Ozaki ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Particle Density ◽  
Physical Phenomenon ◽  
Particle Diameter ◽  
Coarse Grained ◽  
Coarse Grain ◽  
Dem Simulation ◽  
Particle Behavior ◽  
Fluid Drag ◽  
Grain Model

A new simpler coarse-grain model (SCG) for analyzing particle behaviors under fluid flow in a dilute system, by using a discrete element method (DEM), was developed to reduce calculation load. In the SCG model, coarse-grained (CG) particles were enlarged from original particles in the same way as the existing coarse-grain model; however, the modeling concept differed from the other models. The SCG model focused on the acceleration by the fluid drag force, and the CG particles’ acceleration coincided with that of the original particles. Consequently, the model imposed only the following simple rule: the product of particle density and squared particle diameter is constant. Thus, the model had features that can be easily implemented in the DEM simulation to comprehend the modeled physical phenomenon. The model was validated by comparing the behaviors of the CG particles with the original particles in the uniform and the vortex flow fields. Moreover, the usability of the SCG model on simulating real dilute systems was confirmed by representing the particle behavior in a classifier. Therefore, the particle behavior in dilute particle-concentration systems would be analyzed more simply with the SCG model.

Coarse-Grain Model Simulations of Nonequilibrium Dynamics in Heterogeneous Materials

2014 ◽  
Vol 5 (12) ◽  
pp. 2144-2149 ◽  
Author(s):  
John K. Brennan ◽  
Martin Lísal ◽  
Joshua D. Moore ◽  
Sergei Izvekov ◽  
Igor V. Schweigert ◽  
...  
Keyword(s):  
Heterogeneous Materials ◽  
Nonequilibrium Dynamics ◽  
Coarse Grain ◽  
Model Simulations ◽  
Grain Model

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
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