CFD modeling of gas–liquid–solid mechanically agitated contactor

Ranganathan, Panneerselvam; Savithri, S.; Surender, G. D.

doi:10.1016/j.cherd.2008.08.008

Cited by 68 publications

(43 citation statements)

References 30 publications

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“…More recently, new studies have been published on the complex hydrodynamics of mixing vessels, although in all cases the vessel dimensions were less than 0.5 m in height [4][5][6][7]. Nevertheless, there are less published articles and results available for industrial mixing vessels such as the fermentation vessel analyzed in this study.…”

Section: Introductionmentioning

confidence: 95%

Numerical Investigation of the Effect of Impeller Design Parameters on the Performance of a Multiphase Baffle‐Stirred Reactor

Iranzo

Barbero²,

Domingo³

et al. 2011

Chem Eng & Technol

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The turbulent gas-liquid flow field in an industrial 100-m 3 stirred tank was calculated by using computational fluid dynamics based on the finite-volume method. Turbulent effects were modeled with the shear stress transport model, and gasliquid bubbly flow was modeled with the Eulerian-Eulerian approach using the Grace correlation for the drag force interphase momentum transfer. The relative motion between the rotating impeller and the stationary baffled tank was considered by using a multiple frames of reference algorithm. The effects of Rushton and pitched-blade impeller design parameters such as blade geometry, location, and pumping direction on the mixing performance were investigated. It was found that a combination of Rushton turbines with up-pumping pitched-blade turbines provides the best mixing performance in terms of gas holdup and interfacial area density. The approach outlined in this work is useful for performance optimization of biotechnology reactors, as typically found in fermentation processes.

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Section: Introductionmentioning

confidence: 95%

Numerical Investigation of the Effect of Impeller Design Parameters on the Performance of a Multiphase Baffle‐Stirred Reactor

Iranzo

Barbero²,

Domingo³

et al. 2011

Chem Eng & Technol

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“…This value is valid for different impeller designs and is applicable over a wide range of particle sizes and solids loadings. Panneerselvam et al (2008Panneerselvam et al ( , 2009) combined the standard deviation method and cloud height criteria (i.e., the cloud height is equal to 0.9 times the liquid height) and found the latter to be determinant. Hosseini et al (2010) calculated the N js via a CFD model by using the tangent intersection method.…”

Section: Just-suspended Speedmentioning

confidence: 99%

Models and Applications for Simulating Turbulent Solid–Liquid Suspensions in Stirred Tanks

Derksen

Gao

2015

J. Chem. Eng. Japan / JCEJ

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Solid-liquid suspensions in stirred tanks are common unit operations in many process industries. The complex ow characteristics of these systems, such as two-phase turbulence and interphase interaction, make the corresponding numerical simulations complicated and challenging. This paper presents a review of models dealing with the continuous and discrete phases of solid-liquid suspensions and summarizes the applications for simulating related ow phenomena, including velocity and turbulence components, solids concentration, just-suspended speed, cloud height, optimization of geometrical parameters, and particle shape and type. Perspectives concerning di erent modeling approaches are presented, and the Eulerian-Lagrangian approach with resolved particles is highlighted to address the underlying suspension mechanisms in stirred tanks.

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“…The Schiler-Naumann model was chosen for calculating the drag force, and the drag force coefficient [42] is: …”

Section: Continuity and Momentum Equationsmentioning

confidence: 99%

Parameters measurement of hydrodynamics and CFD simulation in multi‐stage bubble columns

et al. 2014

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The effect of superficial gas velocity and structural parameters of plate (perforated plate and tongue plate) on the hydrodynamics parameters of column are studied in a multi-stage bubble column, with 2000 mm height and 282 mm diameter of the multi-stage bubble column, by using the electrical resistance tomography (ERT) technique and computational fluid dynamics (CFD). According to the results, ERT and CFD techniques can be well applied to the measurement and estimation of gas-liquid two-phase processes. The gas holdups, the radial distribution of gas holdup and gas cap height strongly depend on the operating condition and tray structure. By increasing the superficial gas velocity, the gas holdup in the multi-stage bubble column increases. With a decrease of the open area ratio, the hole diameter and tongue angle, the gas holdups and gas cap height below the perforated plate increase. The addition of the perforated plate enhances the flow behaviour of gas-liquid in bubble column. The CFD can then aid the prediction of gas cap height and gas holdup in a multi-stage bubble column.

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CFD modeling of gas–liquid–solid mechanically agitated contactor

Cited by 68 publications

References 30 publications

Numerical Investigation of the Effect of Impeller Design Parameters on the Performance of a Multiphase Baffle‐Stirred Reactor

Numerical Investigation of the Effect of Impeller Design Parameters on the Performance of a Multiphase Baffle‐Stirred Reactor

Models and Applications for Simulating Turbulent Solid–Liquid Suspensions in Stirred Tanks

Parameters measurement of hydrodynamics and CFD simulation in multi‐stage bubble columns

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CFD modeling of gas–liquid–solid mechanically agitated contactor

Cited by 68 publications

References 30 publications

Numerical Investigation of the Effect of Impeller Design Parameters on the Performance of a Multiphase Baffle‐Stirred Reactor

Numerical Investigation of the Effect of Impeller Design Parameters on the Performance of a Multiphase Baffle‐Stirred Reactor

Models and Applications for Simulating Turbulent Solid&#x2013;Liquid Suspensions in Stirred Tanks

Parameters measurement of hydrodynamics and CFD simulation in multi‐stage bubble columns

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Product

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Models and Applications for Simulating Turbulent Solid–Liquid Suspensions in Stirred Tanks