A fluid dynamic model for three-phase airlift reactors

García‐Calvo, Eloy; Rodrı́guez, Antonio Rodrı́guez; Prados, A.; Klein, Jaroslav

doi:10.1016/s0009-2509(98)00302-9

Cited by 55 publications

(33 citation statements)

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“…Some models have been developed for describing the hydrodynamics and /or the gas-liquid mass transfer of the gas-liquid-solid three-phase internal loop airlift reactors for the Newtonian fluids [13][14][15], which predicted the hydrodynamic behavior and/or the gas-liquid mass transfer characteristics well with the experimental results of the gas-liquid-solid three-phase internal loop airlift reactors without large gas recirculation through the downcomer for Newtonian fluids. Van Benthum et al [10,11] developed and then validated a mathematical model to describe the hydrodynamic behavior of the BASE reactor in two-and three-phase systems.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of three-phase internal loop airlift bioreactors with complete gas recirculation for non-Newtonian fluids

Wen

Jia

Cheng

et al. 2005

Bioprocess Biosyst Eng

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Hydrodynamic and gas-liquid mass transfer characteristics, such as liquid velocity, gas holdup, solid holdup and gas-liquid volumetric mass transfer coefficient, in the riser and downcomer of the gas-liquid-solid three-phase internal loop airlift bioreactors with complete gas recirculation for non-Newtonian fluids, were investigated. A mathematical model for the description of flow behavior and gas-liquid mass transfer of these bioreactors was developed. The predicted results of this model agreed well with the experimental data.

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Section: Introductionmentioning

confidence: 99%

Characteristics of three-phase internal loop airlift bioreactors with complete gas recirculation for non-Newtonian fluids

Wen

Jia

Cheng

et al. 2005

Bioprocess Biosyst Eng

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“…traditional slurry bubble columns, namely, a lowering of the gas requirement for complete suspension of the solid particles, better mass and heat transfer performance, elimination of dead volumes, rapid mixing and low energy consumption (Bendjaballah et al, 1999;García-Calvo et al, 1999). Although much work has been carried out to study the hydrodynamic behaviours in an airlift reactor, the present status of the design of such reactors is still closer to an art than science due to the fl ow complexity.…”

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confidence: 99%

Experimental Study and CFD Simulation of Hydrodynamic Behaviours in an External Loop Airlift Slurry Reactor

Wang

2004

Can J Chem Eng

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The local hydrodynamic behaviours in an external loop airlift slurry reactor, including the gas holdup, bubble rise velocity, bubble size, were measured with a fibre optic probe. The liquid circulation velocity was measured with an ultrasound Doppler velocimetry. Two‐dimensional simulations were carried out in the framework of Two‐Fluid formulation coupled with a k‐ϵ turbulence model. The lateral forces and interphase turbulence were taken into account and good agreement between the experimental and simulation results was obtained. The simulations show that the lateral forces and interphase turbulence have noticeable influence and should be included in the CFD model.

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“…García-Calvo et al (421) presented a thermodynamic model (based on the first principle), which is simply an extension of a previous two-phase model (148) to the three-phase airlift reactor (TPAL). The model requires knowledge of the bubble slip velocity.…”

Section: Modelsmentioning

confidence: 99%

Bioreactors: Airlift Reactors

Merchuk

Camacho

2010

Encyclopedia of Industrial Biotechnology

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ALRs are popular in modern bioprocess research and development and, in many cases, they have found industrial uses. The distinctive characteristics of ALRs are conferred by the fluid dynamics of the liquid‐gas or liquid gas‐solid mixtures: holdup, liquid velocity, and mixing in the riser, gas separator, and downcomer. Only a correct understanding of the interconnection of these regions can make possible the scale‐up of a laboratory device, to pilot or industrial size. Several correlations are available in the literature for the prediction of the fluid dynamic characteristics of the reactor and of the mass and heat transfer coefficients, and a selection is presented in this review. Significant progress has been made in the application of modern computational tools to the simulation and design of ALRs. In parallel, innovative and sophisticated methods have been applied to obtain a deeper insight into the mechanisms of fluid motion and the flow patterns in the reactor. However, no single research group has managed to cover all the variables over a wide range. The engineer confronting scale‐up or de novo design of an ALR must analyze the validity of the correlations and computation methods used for the calculations.

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A fluid dynamic model for three-phase airlift reactors

Cited by 55 publications

References 0 publications

Characteristics of three-phase internal loop airlift bioreactors with complete gas recirculation for non-Newtonian fluids

Characteristics of three-phase internal loop airlift bioreactors with complete gas recirculation for non-Newtonian fluids

Experimental Study and CFD Simulation of Hydrodynamic Behaviours in an External Loop Airlift Slurry Reactor

Bioreactors: Airlift Reactors

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