CFD Simulation of a Bubbling Fluidized Bed Gasifier Using a Bubble-Based Drag Model

2014 ◽  
Vol 28 (10) ◽  
pp. 6351-6360 ◽  
Author(s):  
Juhui Chen ◽  
Guangbin Yu ◽  
Bing Dai ◽  
Di Liu ◽  
Lei Zhao
Keyword(s):  
Fluidized Bed ◽  
Cfd Simulation ◽  
Drag Model ◽  
Bubbling Fluidized Bed ◽  
Fluidized Bed Gasifier

Assessment of a bubble-based bi-disperse drag model for the simulation of a bubbling fluidized bed with a binary mixture

2018 ◽  
Vol 338 ◽  
pp. 280-288 ◽  
Author(s):  
Shuai Wang ◽  
Kai Zhang ◽  
Shaodong Xu ◽  
Xuesong Yang
Keyword(s):  
Binary Mixture ◽  
Fluidized Bed ◽  
Drag Model ◽  
Bubbling Fluidized Bed

CFD simulation of gas-solid bubbling fluidized bed containing FCC particles

2009 ◽  
Vol 26 (5) ◽  
pp. 1405-1413 ◽  
Author(s):  
Seyyed Hossein Hosseini ◽  
Rahbar Rahimi ◽  
Mortaza Zivdar ◽  
Abdolreza Samimi
Keyword(s):  
Fluidized Bed ◽  
Cfd Simulation ◽  
Bubbling Fluidized Bed

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

CFD Modelling of a Fluidized Bed Gasifier; Effects of Drag Model and Bed Heights

2014 ◽  
Vol 699 ◽  
pp. 730-735
Author(s):  
Kamariah Md Isa ◽  
Kahar Osman ◽  
Nik Rosli Abdullah ◽  
Azfarizal Mukhtar ◽  
Nor Fadzilah Othman
Keyword(s):  
Fluidized Bed ◽  
Volume Fraction ◽  
Solid Phase ◽  
Multiphase Model ◽  
Cfd Modelling ◽  
Drag Model ◽  
Bed Height ◽  
Representative Unit Cell ◽  
Fluidized Bed Gasifier ◽  
Drag Models

One of the unresolved issues in using the gasifier is the inability to determine the occurrence of the transition regime of fluidized bed. In modeling gas-solid phase, drag force is one of the main mechanisms for inter-phase momentum transfer. Thus, a simulation of fluidized bed was developed to study the effect of using various drag models over different bed height of H/D ratio such as 0.5, 1 and 2. A two dimensional model using Eulerian-Granular Multiphase Model (EGM) based on two fluid models have been used to simulate hydrodynamics of a bubbling fluidized beds. Gas-solid interactions are modeled via inter-phase of a drag model. The drag correlations of Gidaspow, Wen Yu, Syamlal-O'Brien, Hill Koch Ladd (HKL) and Representative Unit Cell (RUC) were implemented to simulate the interaction between phases. From this study, we found that different H/D ratio such as 0.5, 1 and 2 yields different volume fraction as increasing bed height slows kinetic transport of particle sand to the upper side of the bed. Besides that, different H/D ratio also resulted in different velocity vector. The results also show that Wen Yu and Syamlal-O'Brien are sufficient enough in detecting the change from one regime to another regardless of the bed height.

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