Numerical study of bubbly upflows in a vertical channel using the Euler–Lagrange two-way model

Pang, Mingjun; Wei, Jinjia; Yu, Bo

doi:10.1016/j.ces.2010.09.008

Cited by 26 publications

(23 citation statements)

References 67 publications

(106 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The motion equations of microbubbles were solved in time with the second-order Crank-Nicholson scheme to compute the velocities and displacements of microbubbles. The detailed numerical methods on single-and twophase flow were described in the literature (Pang et al, 2010). For the present simulation, the grid system was absolutely same to that developed in the reference (Pang et al, 2010).…”

Section: Methodsmentioning

confidence: 99%

“…(2), * �� denotes the feedback force exerted on the liquid phase by microbubbles, which denotes the effect of microbubbles on the liquid turbulence. The detailed computation on the feedback force can be seen in the reference (Pang et al, 2010). In Eqn.…”

Section: Governing Equationsmentioning

confidence: 99%

“…To investigate numerically the channel bubbly flow laden with microbubbles, an EulerianLagrangian method was successfully developed by Pang et al (2010). For the developed numerical method, the liquid-phase continuity and momentum equations were solved in an Eulerian framework, while the microbubble trajectories were tracked by motion equations following to Newton′s second law.…”

Section: Governing Equationsmentioning

confidence: 99%

“…The definitely normalizated process on the governing equations can be referred to the literature (Pang et al, 2010). The non-dimensional governing equations for the liquid phase can be written as follows.…”

Section: Governing Equationsmentioning

confidence: 99%

See 3 more Smart Citations

Investigation on Effect of Flow Direction on Hydrodynamics for vertical Channel Bubbly Flow

2016

IJM

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on Effect of Flow Direction on Hydrodynamics for vertical Channel Bubbly Flow

2016

IJM

View full text Add to dashboard Cite

“…It has been found that the magnitude of the drag force is more than 100 times higher than the magnitude of other interfacial forces (Laborde-Boutet et al, 2009). Still, forces such as lift and virtual mass can also play an important role in the motion of bubbles under the normal gravity condition (Pang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Influence of Interfacial Forces on the Mixture Prediction of an Anaerobic Sequencing Batch Reactor (Asbr)

Rosa

Maurina

Beal

et al. 2015

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-In the operation of bioreactors, the fluid movement promotes mixing between sludge and substrate. The dynamics of this system are complex, and the interaction between the phases is difficult to evaluate accurately. In this work, Computational Fluid Dynamics is applied to simulate a pilot-scale anaerobic sequencing batch reactor, using a three-dimensional, transient and multiphase modeling. Several correlations were applied to estimate the interfacial forces. Results indicate that the use of different coefficients for the drag and lift forces strongly affects the predicted turbulent kinetic energy, and thus the mixture estimation in the bioreactor. The use of the drag as the only interfacial force provided an average turbulent kinetic energy close to the value found using a more complete model. However, the absence of lift and virtual mass forces had a significant impact on the resulting turbulence distribution.

show abstract

Large eddy simulation of microbubble dispersion and flow field modulation in vertical channel flows

et al. 2019

View full text Add to dashboard Cite

Turbulent liquid–gas vertical channel flows laden with microbubbles are investigated using large eddy simulation (LES) two‐way coupled to a Lagrangian bubble tracking technique. Upward and downward flows at shear Reynolds numbers of Re τ = 150 and 590 are analyzed for three different microbubble diameters of 110, 220, and 330 μm. Predicted results are compared with published direct numerical simulation results although, with respect to comparable studies available in the literature, the range of bubble diameters and shear Reynolds numbers considered herein is extended to larger values. Microbubble concentration profiles are analyzed, with the microbubbles segregating at the wall in upflow conditions and moving toward the channel centre in downflow. The various forces acting on the bubbles, and the effect of the flow turbulence on the bubble concentration, are considered and quantified. Overall, the results suggest that the level of detail achievable with LES is sufficient to predict the fluid structures impacting bubble behavior. Therefore, LES coupled with Lagrangian bubble tracking shows promise for enabling the reliable prediction of bubble‐laden flows that are of industrial relevance. © 2018 American Institute of Chemical Engineers AIChE J, 65: 1325–1339, 2019

show abstract

Numerical study of bubbly upflows in a vertical channel using the Euler–Lagrange two-way model

Cited by 26 publications

References 67 publications

Investigation on Effect of Flow Direction on Hydrodynamics for vertical Channel Bubbly Flow

Investigation on Effect of Flow Direction on Hydrodynamics for vertical Channel Bubbly Flow

Influence of Interfacial Forces on the Mixture Prediction of an Anaerobic Sequencing Batch Reactor (Asbr)

Large eddy simulation of microbubble dispersion and flow field modulation in vertical channel flows

Contact Info

Product

Resources

About