Gas—liquid flow in bubble columns and loop reactors: Part II. Comparison of detailed experiments and flow simulations

Becker, Stefan; Sokolichin, A.; Eigenberger, Gerhart

doi:10.1016/0009-2509(94)00290-8

Cited by 222 publications

(162 citation statements)

References 7 publications

Supporting

Mentioning

134

Contrasting

Unclassified

Order By: Relevance

“…Finally, results obtained with both the EulerianLagrangian model and the Volume Tracking model have been presented. The Eulerian-Lagrangian model could clearly reproduce the experimental results obtained by Becker et al (1995) for both the large and small gas velocity cases. The Volume Tracking or VOF model was used to compute bubble shapes and associated flow patterns for a wide range of E6tv6s and Morton numbers.…”

Section: Discussionsupporting

confidence: 54%

See 1 more Smart Citation

Computational fluid dynamics applied to gas-liquid contactors

Delnoij

Kuipers

Swaaij

1997

Chemical Engineering Science

147

View full text Add to dashboard Cite

Abstract-In this paper a "hierarchy of models' is discussed to study the fluid dynamic behaviour of gas-liquid bubble columns. This 'hierarchy of models' consists of a Eulerian Eulerian two fluid model, a Eulerian-Lagrangian discrete bubble model and a Volume Tracking or Marker Particle model. These models will be briefly reviewed and their advantages and disadvantages will be highlighted. In addition, a mixed Eulerian Lagrangian model and a volume tracking model, both developed at Twente University, will be discussed. Some selected results obtained with these models will be presented with emphasis on the results obtained with the volume tracking model. Finally, a brief discussion on advanced experimental techniques, which reflect the recent progress in experimental fluid dynamics, will be presented. ~ 1997

show abstract

Section: Discussionsupporting

confidence: 54%

“…4. Instantaneous bubble configuration and associated liquid velocity field at three different time levels• Simulation of experiment by Becker et aL (1995). Gas flog' rate= 1.61min -~.…”

Section: Eulerian-layranyian Modelmentioning

confidence: 99%

Computational fluid dynamics applied to gas-liquid contactors

Delnoij

Kuipers

Swaaij

1997

Chemical Engineering Science

147

View full text Add to dashboard Cite

show abstract

“…[43], and has the inner dimension of 900 x 250 x 80 mm. Two spargers, a needle sparger (NS) system and a frit sparger (FS) system had been designed for bubble generation.…”

Section: Flotation Cell and Aeration Systemmentioning

confidence: 99%

Separation of cellulose fibres from pulp suspension by froth flotation fractionation

Redlinger-Pohn

Grabner

Zauner

et al. 2016

Separation and Purification Technology

View full text Add to dashboard Cite

Flotation of cellulose pulp suspension in paper industry is primarily used for separation of ink particles from cellulose fibres. Entrainment, an unwanted phenomena well described in the field of mineral flotation, also leads to a removal of fibres with the flotation froth. We find that the entrainment phenomena can be used for the separation of long fibres from a fibre pulp suspension, and hence for pulp fractionation. Specifically, we use a 2D bubble column to investigate the influence of (i) bubble size, (ii) wash rate and (iii) stirring on the separation of long fibres from cellulose pulp suspension. Separation of fibres from fibre pulp suspension is tested for mechanical pulp and chemical pulp. We find that size selective recovery yields best result for (i) large bubbles, and (ii) additional washing due to the increase of small particle drainage. However, both strategies lead to a reduction of the total recovery rate. Stirring significantly improved the total recovery and benefited the selective separation. Best results are achieved with small bubbles for chemical pulp. For mechanical pulp, fractionation is more challenging due to lower froth stability, but still fibres with a reduced amount of smaller fraction can be recovered.

show abstract

“…15,16 There are numerous studies that have applied either the Euler-Euler or the Euler-Lagrange approach within 2D or 3D two-fluid turbulent models. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] Large-eddy simulation (LES) studies have also been reported in the literature. 33,34 Additionally, several researchers have reported on the prediction of flow-regime transitions using either numerical simulations 35 or linear stability analysis of various model equations.…”

Section: Introductionmentioning

confidence: 99%

Validation of Two-Fluid Simulations of a Pseudo-Two-Dimensional Bubble Column with Uniform and Nonuniform Aeration

Monahan

Fox

2009

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The multiphase flow simulated in this work corresponds to the pseudo-2D bubble-column experiments at Delft University of Technology (Harteveld et al. Can. J. Chem. Eng. 2003, 81, 389-394). As in the work of Monahan and Fox (AIChE J. 2007, 53, 9-18), the complete set of interphase force models includes drag, added-mass, lift, rotation, and strain. The simulation results are presented in the form of comparisons with the experimental data for the time-averaged gas holdup and the instantaneous and time-averaged air and liquid velocity fields. Overall, the qualitative and quantitative comparisons between experiments and simulations are satisfactory for both uniform and nonuniform aeration. In particular, the model predicts the flow patterns observed in the experiments, but in some cases at slightly different values of the amount of aeration. In the latter cases, it is shown that changing the model parameters does not improve the agreement with experiments. However, changing the liquid-velocity boundary condition from zero stress to zero slip leads to a small improvement. The multiphase flow simulated in this work corresponds to the pseudo-2D bubble-column experiments at Delft University of Technology (Harteveld et al. Can. J. Chem. Eng. 2003, 81, 389-394). As in the work of Monahan and Fox (AIChE J. 2007, 53, 9-18), the complete set of interphase force models includes drag, added-mass, lift, rotation, and strain. The simulation results are presented in the form of comparisons with the experimental data for the time-averaged gas holdup and the instantaneous and time-averaged air and liquid velocity fields. Overall, the qualitative and quantitative comparisons between experiments and simulations are satisfactory for both uniform and nonuniform aeration. In particular, the model predicts the flow patterns observed in the experiments, but in some cases at slightly different values of the amount of aeration. In the latter cases, it is shown that changing the model parameters does not improve the agreement with experiments. However, changing the liquid-velocity boundary condition from zero stress to zero slip leads to a small improvement. Disciplines Biological Engineering | Chemical Engineering

show abstract

Gas—liquid flow in bubble columns and loop reactors: Part II. Comparison of detailed experiments and flow simulations

Cited by 222 publications

References 7 publications

Computational fluid dynamics applied to gas-liquid contactors

Computational fluid dynamics applied to gas-liquid contactors

Separation of cellulose fibres from pulp suspension by froth flotation fractionation

Validation of Two-Fluid Simulations of a Pseudo-Two-Dimensional Bubble Column with Uniform and Nonuniform Aeration

Contact Info

Product

Resources

About