Characterization of solids mixing patterns in bubbling fluidized beds

Norouzi, Hamid Reza; Mostoufi, Navid; Mansourpour, Zahra; Sotudeh‐Gharebagh, Rahmat; Chaouki, Jamal

doi:10.1016/j.cherd.2010.10.014

Cited by 82 publications

(39 citation statements)

References 22 publications

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“…This implies that lateral solid dispersion, and in turn the rate of change of the particle concentration, is overestimated in 2D fluidized beds (Norouzi et al, 2011). There is a good match between analytical and numerical profiles of void-free mass fraction reported in Figure 2, confirming that we can indeed employ Eq.…”

Section: Eulerian-eulerian Simulations -2d Versus 3dsupporting

confidence: 68%

Lateral solid mixing in gas-fluidized beds: CFD and DEM studies

Oke

Wachem

Mazzei

2016

Chemical Engineering Research and Design

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We investigated lateral solid mixing in gas-fluidized beds using CFD and DEM. We ran 3D CFD simulations, comparing the results with those formerly obtained in 2D CFD simulations. We observed that the frictional stress model affects the numerical results. This was also observed in 2D simulations, but in 3D simulations the effect is less pronounced. The 3D simulations described the lateral solid mixing process more accurately than the 2D simulations, simulation dimensionality being an important factor. To analyse further the role of frictional stress models, we ran 3D DEM simulations, employing the soft-sphere approach to model the particle-particle contact forces. The simulation results agreed reasonably well with the empirical data, but their accuracy depended on the values used for the collision parameters; also, the 3D CFD simulations matched the empirical data more closely.Altogether, we concluded that the simulation dimensionality plays the dominant role in predicting lateral solid mixing accurately.

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Section: Eulerian-eulerian Simulations -2d Versus 3dsupporting

confidence: 68%

Lateral solid mixing in gas-fluidized beds: CFD and DEM studies

Oke

Wachem

Mazzei

2016

Chemical Engineering Research and Design

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“…For higher velocities, f exp was approximately 1. 25. This variance in f exp is not significant, which make sense because the olivine particles are classified in Geldart group B.…”

Section: Voidagementioning

confidence: 87%

“…Norouzi et al [25] studied the solid mixing pattern in a bubbling fluidized bed using a radioactive tracer with the same density as the bed material. This radioactive particle tracking method for visualizing the fluidized bed interior is an efficient technique, although it involves complex materials.…”

Section: Introductionmentioning

confidence: 99%

Segregation of wood particles in a bubbling fluidized bed

Cluet

Mauviel

Rogaume

et al. 2015

Fuel Processing Technology

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“…Consequently reactor-scale circulation of particle: gross circulation is formed. The passage of a bubble also induces a drift effect in the dense phase which results in a loop displacement of the particles at the scale of the bubble diameter (Norouzi et al, 2011), termed internal circulation. However, there is another important factor in SCW bubbling fluidized bed: vortex, concerning internal circulation.…”

Section: Solids Mixingmentioning

confidence: 99%