Transitional Mixing of Shear‐Thinning Fluids in Vessels with Multiple Impellers

Woziwodzki, Szymon; Broniarz-Press, L.; Ochowiak, Marek

doi:10.1002/ceat.201000121

Cited by 22 publications

(14 citation statements)

References 19 publications

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“…In an impeller‐agitated vessel, the gas holdup is a function of several variables: vessel and impeller design, impeller speed (power input), gas velocity, and physical properties of the liquid 51. Additionally, the rheological properties of the fluids should be considered as well 43, 52. The effects of the impeller design on the gas holdup, especially using the FBDT and its modified designs, in water and viscous liquids have received some attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Aeration of Liquid‐Liquid Systems Using Various Agitators in a Mixer Equipped with a Membrane Diffuser

Szaferski

Mitkowski

2016

Chem Eng & Technol

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Efficient aeration of liquid mixtures is essential in many biochemical and chemical processes. The power requirements needed to obtain three-phase gas-liquid-liquid systems containing air, mineral oil, and water as modeling mixture were analyzed. The influence of using various kinds of agitators consisting of two stirrers on a common shaft and different volume fractions of oil ranging from 0.111 to 0.429 were investigated experimentally. The studies were performed for three configurations of stirrers consisting of Smith disc, Rushton, or flat-blade turbines.

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Section: Introductionmentioning

confidence: 99%

Aeration of Liquid‐Liquid Systems Using Various Agitators in a Mixer Equipped with a Membrane Diffuser

Szaferski

Mitkowski

2016

Chem Eng & Technol

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“…It is therefore desirable to seek alternate mixers that can reduce the mixing time and improve the mixing efficiency. The performance of a mixer can be examined either theoretically by numerical simulation of the flow field [26] or experimentally by using a flow visualization technique and rheological measurements [27] [28].…”

Section: Introductionmentioning

confidence: 99%

An Effective Mixing for Lithium Ion Battery Slurries

Liu

Chen

Liu

et al. 2014

ACES

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Coating slurries for making anodes and cathodes of lithium batteries contain a large percentage of solid particles of different chemicals, sizes and shapes in highly viscous media. A thorough mixing of these slurries poses a major challenge in the battery manufacturing process. Several types of mixing devices and mixing methods were examined. The conventional turbine stirrers or ball mill mixers could be adequately used for the preparation of anode slurries, but not suitable for cathode slurries. In this study, a newly three-dimensional mixer, in conjunction with a multi-stage mixing sequence was proposed. The mixing effectiveness was examined by means of rheological measurements and flow visualization techniques. Preliminary electrical performance results indicated that the battery obtained using the 3D mixing device with a multi-stage mixing sequence was more efficient to those obtained from conventional methods.

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“…Filamentous fungi are widely used in various pharmaceutical, food, and enzyme-producing processes [6][7][8]. Both experimental and numerical studies have been reported on the hydrodynamics of complex mixing systems involving multiple and independent impellers [13][14][15]. Another problem arises when microorganisms produced during fermentation are sensitive to high shear stress (filamentous fungi).…”

Section: Introductionmentioning

confidence: 99%

Mixing Analysis for a Fermentation Broth of the Fungus Beauveria bassiana under Different Hydrodynamic Conditions in a Bioreactor

Núñez-Ramírez

Valencia-López²,

Calderas

et al. 2012

Chem Eng & Technol

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The performances of radial-axial flow (Rushton-Maxflo impellers) and axialradial flow (Maxflo-Rushton impellers) mixers in the laminar-transitional flow regime were experimentally and numerically investigated with Newtonian and non-Newtonian fluids. The rheological properties for a fermentation broth consisting of the fungus Beauveria bassiana were studied under different hydrodynamic conditions in these systems. The bioreactor was a continuous stirred-tank reactor (CSTR), set at different stirring velocities. The rheology of the systems exhibited shear-thinning behavior which was modeled with the power law model. The experimental hydrodynamics and configuration modes were compared and simulated with a model fluid system and by numerical criteria (computational fluid dynamics). The R-M mode was found to be more efficient than the M-R rotating mode in terms of energy and homogenization time. The results will help in the optimization of scale-up production of these fungi.

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Transitional Mixing of Shear‐Thinning Fluids in Vessels with Multiple Impellers

Cited by 22 publications

References 19 publications

Aeration of Liquid‐Liquid Systems Using Various Agitators in a Mixer Equipped with a Membrane Diffuser

Aeration of Liquid‐Liquid Systems Using Various Agitators in a Mixer Equipped with a Membrane Diffuser

An Effective Mixing for Lithium Ion Battery Slurries

Mixing Analysis for a Fermentation Broth of the Fungus Beauveria bassiana under Different Hydrodynamic Conditions in a Bioreactor

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