Fluid hydrodynamic characteristics in supercritical water fluidized bed: A DEM simulation study

Lu, Youjun; Huang, Jinliang; Zheng, Pengfei

doi:10.1016/j.ces.2014.06.032

Cited by 56 publications

(23 citation statements)

References 28 publications

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“…It was obvious that both the non-spherical particle drag model and the Gidaspow drag model predicted a transformation process from homogeneous fluidization to the bubbling zone. These simulated results were consistent with those in the literature (Lu et al, 2014). However, the nonspherical particle drag model predicted a smaller superficial velocity for bubble occurrence than the Gidaspow drag model.…”

Section: Bed Expansion Predicted By Gidaspow and Non-sphere Particle supporting

confidence: 94%

“…Vogt et al (2005b) found the bubbles in supercritical CO 2 fluidized bed are quite small. The bubbling phenomenon has been observed in the SCW fluidized bed by a DEM study (Lu et al, 2014). Fig.…”

Section: Bed Expansion Predicted By Gidaspow and Non-sphere Particle mentioning

confidence: 96%

“…The model provided consistent flow structures with the tested results in the sub-critical and supercritical zones. Lu et al (2014) simulated the fluidization process in the SCW fluidized bed through a CFD-DEM study. Vogt et al (2005a) developed a compromised model to compute the movement of bubbles in a supercritical CO 2 fluidized bed on the basis of empirical correlations.…”

Section: Armentioning

confidence: 99%

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A numerical study of bed expansion in supercritical water fluidized bed with a non-spherical particle drag model

Wei

2015

Chemical Engineering Research and Design

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Section: Bed Expansion Predicted By Gidaspow and Non-sphere Particle supporting

confidence: 94%

Section: Bed Expansion Predicted By Gidaspow and Non-sphere Particle mentioning

confidence: 96%

Section: Armentioning

confidence: 99%

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A numerical study of bed expansion in supercritical water fluidized bed with a non-spherical particle drag model

Wei

2015

Chemical Engineering Research and Design

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“…The simulation results were compared to concerned experimental and numerical results published in the literature. 18,19 Numerical method…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional numerical study on flow dynamics characteristics in supercritical water fluidized bed with consideration of real particle size distribution by computational particle fluid dynamics method

Jin

et al. 2018

Advances in Mechanical Engineering

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Supercritical water fluidized bed is a promising reactor which can realize the efficient and clean gasification of coal to produce hydrogen. As the high pressure and temperature inside supercritical water fluidized bed, the study of the detail flow behaviors needs the help of numerical method. Considering the limitation of the two-fluid method and discrete element method, the computational particle fluid dynamics method was applied to this work. When particle size distribution was taken into consideration, the simulated results showed that the transformation from fixed bed regime to fluidized bed regime is a gradual process. With the increase in superficial fluid velocity, particles in small diameter migrate to the top of the bed and there exits layering phenomenon in the bed. Besides, though the particles are categorized as Geldart B group, the minimum fluidization velocity is not equal to the minimum bubbling fluidization velocity and there is a complicated bed expansion process after incipient fluidization. The bed expansion process is also influenced by the particle size distribution.

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“…A combination drag of the non-spherical particle drag model and the Ergun equation has been validated by comparing experimental data of the SCWFB. More recently, Lu et al [20,21] studied the fluidization process of Geldart Group B particles in SCW by a CFD-DEM model. Fluidization transition of fixed-homogeneous-bubbling zone was observed in the simulation work.…”

Section: Simulation Advancementioning

confidence: 99%

A Review on Supercritical Fluidization

Lu¹,

Wei²,

Huang³

2018

Thermal Power Plants - New Trends and Recent Developments

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Fluid hydrodynamic characteristics in supercritical water fluidized bed: A DEM simulation study

Cited by 56 publications

References 28 publications

A numerical study of bed expansion in supercritical water fluidized bed with a non-spherical particle drag model

A numerical study of bed expansion in supercritical water fluidized bed with a non-spherical particle drag model

Three-dimensional numerical study on flow dynamics characteristics in supercritical water fluidized bed with consideration of real particle size distribution by computational particle fluid dynamics method

A Review on Supercritical Fluidization

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