Mesoscale model of radial hydrodynamics for fluidizing small particles with low solid holdup in gas-liquid-solid circulating fluidized bed

2022 ◽  
pp. 117413
Author(s):  
Yongli Ma ◽  
Mingyan Liu ◽  
Chen Li ◽  
Xiuhong Zhou
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Mesoscale Model ◽  
Small Particles ◽  
Solid Holdup

scholarly journals An Assessment of Drag Models in Eulerian–Eulerian CFD Simulation of Gas–Solid Flow Hydrodynamics in Circulating Fluidized Bed Riser

2020 ◽  
Vol 4 (2) ◽  
pp. 37 ◽  
Author(s):  
Mukesh Upadhyay ◽  
Ayeon Kim ◽  
Heehyang Kim ◽  
Dongjun Lim ◽  
Hankwon Lim
Keyword(s):  
Fluidized Bed ◽  
Cfd Simulation ◽  
Circulating Fluidized Bed ◽  
Model Simulation ◽  
Scale Up ◽  
Radial Profile ◽  
Momentum Exchange ◽  
Drag Model ◽  
Solid Holdup ◽  
Drag Models

Accurate prediction of the hydrodynamic profile is important for circulating fluidized bed (CFB) reactor design and scale-up. Multiphase computational fluid dynamics (CFD) simulation with interphase momentum exchange is key to accurately predict the gas-solid profile along the height of the riser. The present work deals with the assessment of six different drag model capability to accurately predict the riser section axial solid holdup distribution in bench scale circulating fluidized bed. The difference between six drag model predictions were validated against the experiment data. Two-dimensional geometry, transient solver and Eulerian–Eulerian multiphase models were used. Six drag model simulation predictions were discussed with respect to axial and radial profile. The comparison between CFD simulation and experimental data shows that the Syamlal-O’Brien, Gidaspow, Wen-Yu and Huilin-Gidaspow drag models were successfully able to predict the riser upper section solid holdup distribution with better accuracy, however unable to predict the solid holdup transition region. On the other hand, the Gibilaro model and Helland drag model were successfully able to predict the bottom dense region, but the upper section solid holdup distribution was overpredicted. The CFD simulation comparison of different drag model has clearly shown the limitation of the drag model to accurately predict overall axial heterogeneity with accuracy.

scholarly journals Solid holdup in liquid solid circulating fluidized bed with viscous liquid medium

2014 ◽  
Vol 53 (4) ◽  
pp. 959-968 ◽  
Author(s):  
Nirmala Gnanasundaram ◽  
Muruganandam Loganathan ◽  
Kumar Perumal
Keyword(s):  
Liquid Medium ◽  
Fluidized Bed ◽  
Viscous Liquid ◽  
Circulating Fluidized Bed ◽  
Solid Holdup

Powder coating efficiency of small particles and their agglomeration in circulating fluidized bed

1999 ◽  
Vol 16 (5) ◽  
pp. 630-634 ◽  
Author(s):  
Hiroyuki Kage ◽  
Mitsunaga Dohzaki ◽  
Hironao Ogura ◽  
Yoshizo Matsuno
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Powder Coating ◽  
Small Particles ◽  
Coating Efficiency

Modeling of Solid Fuel Combustion in Furnaces with a Circulating Fluidized Bed

2008 ◽  
Vol 39 (1) ◽  
pp. 65-78
Author(s):  
Yu. S. Teplitskii ◽  
V. A. Borodulya ◽  
V. I. Kovenskii ◽  
E. P. Nogotov
Keyword(s):  
Fluidized Bed ◽  
Solid Fuel ◽  
Circulating Fluidized Bed ◽  
Fuel Combustion ◽  
Solid Fuel Combustion
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