Unresolved CFD-DEM simulation of spherical and ellipsoidal particles in conical and prismatic spouted beds

Atxutegi, Aitor; Kieckhefen, Paul; Pietsch, Swantje; Aguado, Roberto; Olazar, Martı́n; Heinrich, Stefan

doi:10.1016/j.powtec.2021.05.012

Cited by 22 publications

(9 citation statements)

References 62 publications

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“…They found that the effect of particle−wall restitution coefficient on radial as well as axial solid vertical velocity is insignificant. Atxutegi et al 49 have recently used unresolved CFD-DEM technique to predict the orientation of spherical and ellipsoidal particles in conical and prismatic spouted bed.…”

Section: ■ Introductionmentioning

confidence: 99%

Numerical Studies on Particle Dynamics in a Spouted Bed

Raman

Mollick

Goswami

2021

Ind. Eng. Chem. Res.

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A coupled computational fluid dynamics (CFD)discrete element method (DEM) technique has been adopted to examine the dynamic behavior of particles in a rectangular spouted bed. Eulerian method has been used to solve the Navier−Stokes equation for the gas phase (for the CFD) and Lagrangian method (for the DEM) for the particle phase, where the k−ϵ two-equation turbulence model has been used to capture the effect of gas-phase turbulence. In the present work, we sought to predict the minimum spouting velocity (U ms ) numerically for a fixed bed height and particular particle properties. The effects of the inelastic collision and the friction on translational and rotational dynamics of the particles in spout, annulus, and fountain zones have been brought out with the intensive parametric study. The results reported here would be a way forward for a better understanding of the spouted bed processing where translational and rotational dynamics of particles play a key role.

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Section: ■ Introductionmentioning

confidence: 99%

Numerical Studies on Particle Dynamics in a Spouted Bed

Raman

Mollick

Goswami

2021

Ind. Eng. Chem. Res.

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“…DEM equations are simultaneous solved with the RANS equation for the particle phase. All the simulations are performed with open-source CFDEM. , A few of the earlier studies ,, also used that software to simulate fluid–particle systems. The finite volume method is used to solve the gas-phase equation with no-slip boundary conditions at the wall, and at the exit a zero pressure outlet is used.…”

Section: Simulation Methodsmentioning

confidence: 99%

Computational Fluid Dynamics–Discrete Element Method Studies on Dynamics and Segregation in Spouted Bed with Polydispersed Particles

Raman

Mollick

Goswami

2022

Ind. Eng. Chem. Res.

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The computational fluid dynamics−discrete element method (CFD−DEM) technique has been used to investigate the translational and rotational dynamics of polydispersed particles in a pseudo-two-dimensional spouted bed. Minimum spouting velocity is predicted numerically and compared with the experimental measurements. The mean particle-phase translational and angular velocities have been computed and compared for finer and coarser particles. The dynamics of the polydispersed particles have been compared with monosize particles having an equivalent Sauter mean diameter. In the polydispersed bed, particles with lower diameters spread up to the wall of the spout setup, leading to a reduction in a particle-free zone away from the core. Segregation of the finer and the coarser particles has been assessed for different superficial gas velocities. The bigger particles are concentrated in the central part of the bed, and their concentration decreases laterally from the spout to the annulus region. An increased concentration of finer particles is observed near the wall. The extent of near-wall segregation decreases with an increase in gas velocity.

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“…The drag coefficients for both models for 0°are always below Di Felice [45], but for 90°they are clearly above. Further information can be found in Atxutegi et al [6].…”

Section: Drag Force Modelingmentioning

confidence: 99%

“…This method was used in our previous work experimentally only [33] as well as experimentally and numerically [11,12]. Atxutegi et al [6] implemented different drag models for superquadric particles in CFD-DEM. They calculated the particle motion of spherical and ellipsoidal particles in a spouted bed using different drag models and compared the results with experimental measurements.…”

Section: Introductionmentioning

confidence: 99%

“…With the two-way coupling of computational fluid dynamics (CFD) and discrete element method (DEM) it is possible to model and simulate the gas and particular phases even in complex processes. Two-way coupling CFD-DEM simulations are particularly suitable to obtain more in-depth knowledge of particle dynamics in fluidized beds [6][7][8][9]. In CFD, the flow field of the gas in the process is determined, treating the fluid phase as a continuum.…”

Section: Introductionmentioning

confidence: 99%

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CFD‐DEM Simulation of Superquadric Cylindrical Particles in a Spouted Bed and a Rotor Granulator

Grohn

Schaedler

Atxutegi

et al. 2022

Chemie Ingenieur Technik

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Dedicated to Prof. Dr.-Ing. Joachim Werther on the occasion of his 80th birthdayThe fluidization behavior of cylindrical particles in a spouted bed was first investigated experimentally using a camera setup. The obtained average spouted bed height was used to evaluate the accuracy of different drag models in CFD-DEM simulations with the superquadric approach to model the particle shape. The drag model according to Sanjeevi et al. showed the best agreement. With this model, cylindrical particles were simulated in a rotor granulator and the particle dynamics were compared with the fluidization of volume equivalent spherical particles.

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Unresolved CFD-DEM simulation of spherical and ellipsoidal particles in conical and prismatic spouted beds

Cited by 22 publications

References 62 publications

Numerical Studies on Particle Dynamics in a Spouted Bed

Numerical Studies on Particle Dynamics in a Spouted Bed

Computational Fluid Dynamics–Discrete Element Method Studies on Dynamics and Segregation in Spouted Bed with Polydispersed Particles

CFD‐DEM Simulation of Superquadric Cylindrical Particles in a Spouted Bed and a Rotor Granulator

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