Eulerian–Lagrangian based large-eddy simulation of a partially aerated flat bubble column

Hu, Guojie; Çelik, İsmail

doi:10.1016/j.ces.2007.09.015

Cited by 62 publications

(40 citation statements)

References 57 publications

(91 reference statements)

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“…The geometry selected corresponds to the 'Becker case' [51], which has become an almost standard test case in the chemical engineering literature [52][53][54][55]. The domain is shown in Figure 23(a), and its characteristic dimensions are summarized in Table VI.…”

Section: Les Of Rising Bubble Columnmentioning

confidence: 99%

A numerical scheme for Euler–Lagrange simulation of bubbly flows in complex systems

Shams

Finn

Apte

2010

Numerical Methods in Fluids

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SUMMARYAn Eulerian-Lagrangian approach is developed for the simulation of turbulent bubbly flows in complex systems. The liquid phase is treated as a continuum and the Navier-Stokes equations are solved in an unstructured grid, finite volume framework for turbulent flows. The dynamics of the disperse phase is modeled in a Lagrangian frame and includes models for the motion of each individual bubble, bubble size variations due to the local pressure changes, and interactions among the bubbles and with boundaries. The bubble growth/collapse is modeled by the Rayleigh-Plesset (RP) equation. Three modeling approaches are considered: (a) one-way coupling, where the influence of the bubble on the fluid flow is neglected, (b) two-way coupling, where the momentum-exchange between the fluid and the bubbles is modeled, and (c) volumetric coupling, where the volumetric displacement of the fluid by the bubble motion and the momentum-exchange are modeled. A novel adaptive time-stepping scheme based on stability-analysis of the non-linear bubble dynamics equations is developed. The numerical approach is verified for various single bubble test cases to show second-order accuracy. Interactions of multiple bubbles with vortical flows are simulated to study the effectiveness of the volumetric coupling approach in predicting the flow features observed experimentally. Finally, the numerical approach is used to perform a large-eddy simulation in two configurations: (i) flow over a cavity to predict small-scale cavitation and inception and (ii) a rising dense bubble plume in a stationary water column. The results show good predictive capability of the numerical algorithm in capturing complex flow features.

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Section: Les Of Rising Bubble Columnmentioning

confidence: 99%

A numerical scheme for Euler–Lagrange simulation of bubbly flows in complex systems

Shams

Finn

Apte

2010

Numerical Methods in Fluids

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“…Since the systems under consideration have a global gas phase volume fraction of only up to 3%, it was assumed that the void fraction term in the conservation equations of the liquid phase had only a marginal effect on the flow and that the filtered conservation equations for a single-phase flow were approximately valid (Sungkorn et al, 2011(Sungkorn et al, , 2012Hu and Celik, 2008). The effect of the reactor components, i.e., impeller, baffles and tank wall, on the liquid phase was modeled using an immersed boundary condition (IBC) approach, under which the forces exerted by the reactor components were included in the conservation equations via source terms (Goldstein et al, 1993;Derksen et al, 1997).…”

Section: Liquid Phase Hydrodynamicsmentioning

confidence: 99%

Modeling of aerated stirred tanks with shear-thinning power law liquids

Sungkorn

Derksen

Khinast

2012

International Journal of Heat and Fluid Flow

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“…Among the available modeling techniques, the Eulerian multi-fluid approach is the most common approach for simulating bubble column reactors, as reported in the review of Jakobsen et al [395]. Different studies have applied the Eulerian-Lagrangian approach [396][397][398][399][400][401] but have still been limited to the simulation of small-scale reactors with low ε G . It is worth noting that, at present, it is possible to model the flow regimes listed in Section 2.2.1 by using different modeling approaches (see the discussion below); unfortunately, a comprehensive model, able to simulate the whole range of operating conditions in bubble columns, is still missing.…”

Section: The Modeling Approachesmentioning

confidence: 99%

Two-Phase Bubble Columns: A Comprehensive Review

2018

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We present a comprehensive literature review on the two-phase bubble column; in this review we deeply analyze the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer phenomena. First, we discuss the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer. We also discuss how the operating parameters (i.e., pressure, temperature, and gas and liquid flow rates), the operating modes (i.e., the co-current, the counter-current and the batch modes), the liquid and gas phase properties, and the design parameters (i.e., gas sparger design, column diameter and aspect ratio) influence the flow regime transitions and the fluid dynamics parameters. Secondly, we present the experimental techniques for studying the global and local fluid dynamic properties. Finally, we present the modeling approaches to study the global and local bubble column fluid dynamics, and we outline the major issues to be solved in future studies.

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Eulerian–Lagrangian based large-eddy simulation of a partially aerated flat bubble column

Cited by 62 publications

References 57 publications

A numerical scheme for Euler–Lagrange simulation of bubbly flows in complex systems

A numerical scheme for Euler–Lagrange simulation of bubbly flows in complex systems

Modeling of aerated stirred tanks with shear-thinning power law liquids

Two-Phase Bubble Columns: A Comprehensive Review

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