An Effect of a Baffle Length on the Power Consumption in an Agitated Vessel

Karcz, J.; Major, Marta

doi:10.1016/s0255-2701(98)00033-6

Cited by 43 publications

(34 citation statements)

References 14 publications

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“…Towards higher immersion depths, the increase of Ne over baffle length again leads to a stronger growing power consumption. Such results with sigmoidal behavior have been reported in literature for single Rushton turbines [34] as well as dual Rushton turbines [36]. The results of this study have been approximated for both types of baffles with a cubic equation:…”

Section: Power Numbersupporting

confidence: 69%

“…Karcz and Major [34] have presented the influence of baffle length within the following systems; standard radial impellers, Rushton and Smith turbine, standard axial impeller, pitched blade turbine and propeller. They have investigated a vessel with four planar baffles and H/T ratio of 1.0 [34]. These investigations revealed a strong relationship between baffle length and power consumption.…”

Section: Power Numbermentioning

confidence: 99%

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Prediction of drop sizes for liquid–liquid systems in stirred slim reactors—Part I: Single stage impellers

Maaß

Rehm

Kraume

2010

Chemical Engineering Journal

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Section: Power Numbersupporting

confidence: 69%

Section: Power Numbermentioning

confidence: 99%

Prediction of drop sizes for liquid–liquid systems in stirred slim reactors—Part I: Single stage impellers

Maaß

Rehm

Kraume

2010

Chemical Engineering Journal

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“…The investigations aim to complete the power analyses that have already been carried out by the authors for slim reactors [1,31] [32] as well as for dual Rushton turbines [33]. This physically expected behavior is excellently predicted by the CFD simulations for the standard RCI.…”

Section: Power Numbermentioning

confidence: 89%

Flow Field Analysis of Stirred Liquid‐Liquid Systems in Slim Reactors

Maaß¹,

Eppinger²,

Altwasser³

et al. 2011

Chem Eng & Technol

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Previous studies have shown the great potential, but also the great challenges, in handling slim reactors often used for polymerization reactions. Experiments and simulations were carried out in reactors with aspect-to-diameter ratios of up to 5, to test and to evaluate the mixing and dispersion efficiency for liquid-liquid systems of single-and multiple-stage impellers. Therefore, power consumption, mixing time and minimum dispersion speed were determined for five different stirrer types under turbulent conditions. It was found that the dimensionless mixing time is highly sensitive to the configuration of the impellers, with almost no dependency on the turbulent power number. Another focus was the analysis of the effect of the baffles. The influence of the baffle length in slim reactors on the mixing time and the macroscopic flow field was determined.

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“…Murthy and Joshi [5] tested five impeller designs namely disc turbine, variety of pitched blade down flow turbine impellers varying in blade angle and hydrofoil impeller. Karcz and Major [6] studied the influence of the baffles length in a stirred tank equipped with different types of turbines like the Rushton turbine, the Smith turbine, the pitched blade turbine and the propeller. Placek and Tavlarides [7] presented 2D simulation using the model of discharge flow from a turbine disc.…”

Section: Laboratory Of Electro-mechanic Systems (Lasem) National Schmentioning

confidence: 99%

A Study of Mixing Structure in Stirred Tanks Equipped with Multiple Four-Blade Rushton Impellers

Driss¹,

Karray²,

Chtourou³

et al. 2012

Archive of Mechanical Engineering

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The effect of multiple Rushton impellers configurations on hydrodynamics and mixing performance in a stirred tank has been investigated. Three configurations defined by one, two and three Rushton impellers are compared. Results issued from our computational fluid dynamics (CFD) code are presented here concerning fields of velocity components and viscous dissipation rate. These results confirm that the multi-impellers systems are necessary to decrease the weaken zones in each stirred tanks. The experimental results developed in this work are compared with our numerical results. The good agreement validates the numerical method.

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An Effect of a Baffle Length on the Power Consumption in an Agitated Vessel

Cited by 43 publications

References 14 publications

Prediction of drop sizes for liquid–liquid systems in stirred slim reactors—Part I: Single stage impellers

Prediction of drop sizes for liquid–liquid systems in stirred slim reactors—Part I: Single stage impellers

Flow Field Analysis of Stirred Liquid‐Liquid Systems in Slim Reactors

A Study of Mixing Structure in Stirred Tanks Equipped with Multiple Four-Blade Rushton Impellers

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