Numerical study on the hydrodynamics of a fluidized-bed of bioparticles in tapered bioreactors with square shape cross-section

Koerich, Daniela M.; Lopes, Gabriela Cantarelli; Rosa, Leonardo Machado da

doi:10.1007/s43153-020-00010-4

Cited by 6 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to experimental studies, computational fluid dynamics (CFD)-based mathematical modeling has also been used to understand the hydrodynamics of tapered fluidized beds. − The multifluid Eulerian approach was used to simulate the solid volume fraction using different drag laws. The solid phase was divided into three phases to account for wide particle size distribution and compared with single solid-phase results.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Bubble Behavior in a Two-Dimensional Gas–Solid Tapered Fluidized Bed

Sahoo

Sarkar

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The hydrodynamics of tapered fluidized beds is significantly different from the columnar beds due to the variation of the cross-sectional area along the height. The hydrodynamic behavior in tapered beds was studied experimentally using an image analysis method. The peripheral unfluidized region was quantified through the overlapping of binary images. Further, the effect of the taper angle and air velocity on the bubble size, shape, fraction, and rise velocity, along with the bed expansion ratio and the unfluidized region, was investigated. A new method is proposed to obtain expanded bed height from an image. The time-averaged bed expansion ratio and bubble fraction increase with the air velocity and decrease with the taper angle, while a reverse trend is observed for the mean unfluidized area fraction. Correlations are proposed for predicting the bubble fraction, bed expansion ratio, and unfluidized area fraction. An operating regime map is also proposed based on the unfluidized region.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Study of Bubble Behavior in a Two-Dimensional Gas–Solid Tapered Fluidized Bed

Sahoo

Sarkar

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Liu et al (2016) evaluated the effect of the interstitial fluid incorporating the dynamic coefficient of restitution into the damping coefficient through DEM simulations and found the influence of this parameter on the energy dissipation of the system and the hydrodynamics of wet particles fluidization. Koerich et al (2020) studied the hydrodynamic behavior of a liquid-solid fluidized bed in conical bioreactors using Eulerian-Eulerian simulations and concluded that the distribution of particles in the fluidized bed was non-uniform and was significantly affected by collisions in the bed.…”

Section: Introductionmentioning

confidence: 99%

Implementation, validation and application of a lubrication force model in CFD-DEM simulations

Campos

Melo

Lopes

2021

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

Numerical simulations using CFD-DEM (Computational Fluid Dynamics-Discrete Elements Method) are used to investigate the hydrodynamic behavior of the phases in solid-liquid fluidized beds. However, some challenges are posed to the prediction of energy dissipation and bed expansion on these systems-little knowledge on the collision effects on the solid phase and the high computational cost of assessing the dissipative effects of the lubrication force resulting from the liquid phase. In this context, the present study assessed the collision effects based on the coefficient of restitution, the main parameter of contact between the particles, and the influence of the lubrication force on the dynamics of a fluidized bed. For this, a lubrication force model was implemented in an open-source software CFDEM®project. The model was tested for collisions with fluids of different viscosities and showed good agreement with experimental data. Furthermore, the model was applied to the simulation of a fluidized bed using a high viscosity liquid and dense particles and the results indicated that the lubrication force had a significant impact on the bed dynamics, influencing the fraction of voids, porosity and particle velocity.

show abstract

Hydrodynamics of expanded bed adsorption studied through CFD-DEM

Nijssen

Padding

Ottens

2023

Chemical Engineering Science

View full text Add to dashboard Cite

Numerical study on the hydrodynamics of a fluidized-bed of bioparticles in tapered bioreactors with square shape cross-section

Cited by 6 publications

References 25 publications

Experimental Study of Bubble Behavior in a Two-Dimensional Gas–Solid Tapered Fluidized Bed

Experimental Study of Bubble Behavior in a Two-Dimensional Gas–Solid Tapered Fluidized Bed

Implementation, validation and application of a lubrication force model in CFD-DEM simulations

Hydrodynamics of expanded bed adsorption studied through CFD-DEM

Contact Info

Product

Resources

About