Bubble size prediction for rigid and flexible spargers

Geary, Nicholas W.; Rice, Richard G.

doi:10.1002/aic.690370202

Cited by 82 publications

(63 citation statements)

References 16 publications

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“…The average diameter of bubbles entering the system was determined to be 8 mm. This value is in good agreement with correlation for inlet bubble size given by Geary and Rice (1991).…”

Section: Bubble Size Distributionsupporting

confidence: 79%

CFD Prediction of Gas-Liquid Flow in an Aerated Stirred Vessel Using the Population Balance Model

Kálal¹,

Jahoda²,

Fořt³

2014

Chemical and Process Engineering

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The main topic of this study is the experimental measurement and mathematical modelling of global gas hold-up and bubble size distribution in an aerated stirred vessel using the population balance method. The air-water system consisted of a mixing tank of diameter T = 0.29 m, which was equipped with a six-bladed Rushton turbine. Calculations were performed with CFD software CFX 14.5. Turbulent quantities were predicted using the standard k-ε turbulence model. Coalescence and breakup of bubbles were modelled using the homogeneous MUSIG method with 24 bubble size groups. To achieve a better prediction of the turbulent quantities, simulations were performed with much finer meshes than those that have been adopted so far for bubble size distribution modelling. Several different drag coefficient correlations were implemented in the solver, and their influence on the results was studied. Turbulent drag correction to reduce the bubble slip velocity proved to be essential to achieve agreement of the simulated gas distribution with experiments. To model the disintegration of bubbles, the widely adopted breakup model by Luo & Svendsen was used. However, its applicability was questioned.

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“…The average diameter of bubbles entering the system was determined to be 8 mm. This value is in good agreement with correlation for inlet bubble size given by Geary and Rice (1991).…”

Section: Bubble Size Distributionsupporting

confidence: 79%

CFD Prediction of Gas-Liquid Flow in an Aerated Stirred Vessel Using the Population Balance Model

Kálal¹,

Jahoda²,

Fořt³

2014

Chemical and Process Engineering

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“…They introduced this as an important element in membrane sparger design. Geary and Rice (1991) predicted the bubble size from rigid and ''flexible spargers,'' but several variables have to be measured to use their theory.…”

Section: Membrane Characteristicsmentioning

confidence: 99%

Characterization of gas transfer and mixing in a bubble column equipped with a rubber membrane diffuser

Poulsen¹,

Iversen²

1998

Biotechnol. Bioeng.

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“…30b). It is worth noting that the BSD at the sparger depends on many design parameters (i.e., the hole of the sparger and the flowrate) as reported by Hur et al (2013) and Geary and Rice (1991). For example, a sensitivity analysis made by Cao et al (2009) using the Geary and Rice (1991) model showed that increasing hole flowrate or decreasing hole dimensions lead to larger bubbles, whereas an increasing number of holes results in smaller bubbles detaching from the sparger.…”

Section: Image Analysismentioning

confidence: 99%

Comprehensive experimental investigation of counter-current bubble column hydrodynamics: Holdup, flow regime transition, bubble size distributions and local flow properties

Besagni

Inzoli

2016

Chemical Engineering Science

117

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Bubble size prediction for rigid and flexible spargers

Abstract: There exists a narrow operating window in bubble columns

Cited by 82 publications

References 16 publications

CFD Prediction of Gas-Liquid Flow in an Aerated Stirred Vessel Using the Population Balance Model

CFD Prediction of Gas-Liquid Flow in an Aerated Stirred Vessel Using the Population Balance Model

Characterization of gas transfer and mixing in a bubble column equipped with a rubber membrane diffuser

Comprehensive experimental investigation of counter-current bubble column hydrodynamics: Holdup, flow regime transition, bubble size distributions and local flow properties

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