Numerical study of fluid flow and power consumption in a stirred vessel with a Scaba 6SRGT impeller

Ameur, Houari; Bouzit, Mohamed; Helmaoui, Mustapha

doi:10.2478/v10176-011-0028-0

Cited by 23 publications

(8 citation statements)

References 36 publications

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“…Fermentation is the conversion of carbohydrates to alcohols and carbon dioxide or organic acids using desirable microorganisms. The fermentation is carried out in specially designed and engineered device or system called fermenter [1,2]. The class of fermenters varies in a wide range according to the requirement of process to be carried out.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Impellers and Baffles on Aerobic Stirred Tank Fermenter using Computational Fluid Dynamics

Sharma¹

2014

J Bioproces Biotech

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The present research was carried out with objective to study the effect of different types of Impellers and Baffles on mixing and to examine the correlation between mixing time and mass transfer of Aerobic Stirred Tank Fermenter. An Aerobic Stirred Tank fermenter was assembled with different Impellers and Baffles alternately. The four different Impellers used were Rushton Impeller, Marine Impeller, A320 Impeller and HE3 Impeller while walled and un walled baffles were used in combination with these Impellers. The Fermenter was assembled with Resistance Temperature Detector, pH Probe and Pressure Gauge. Tachometer was used to calculate the Mixing Time of Fermenter. Volumetric Mass Transfer Coefficient was experimentally determined and calculated by the respective formulae. MATLAB was used for Mathematical Modelling of CFD, while Autodesk Simulation CFD and ANSYS FLUENT were used to generate the simulations. Turbulence lengths and Trailing Vortices were used to understand flow patterns inside the fermenter created by Impellers and Baffles. The k L a values suggested that Rushton Impeller was the most efficient among all. Turbulent Kinetic Energy and Turbulent Dissipation Rate were to understand the mixing efficiency of every Impeller.

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Section: Introductionmentioning

confidence: 99%

Effect of Different Impellers and Baffles on Aerobic Stirred Tank Fermenter using Computational Fluid Dynamics

Sharma¹

2014

J Bioproces Biotech

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“…The no-slip velocity condition was applied to all solid surfaces. Further details can be found elsewhere (Ameur et al, 2011).…”

Section: Numerical Detailsmentioning

confidence: 99%

Effect of Some Design Parameters on the Flow Fields and Power Consumption in a Vessel Stirred by a Rushton Turbine

Youcefi¹,

Bouzit²,

Ameur³

et al. 2013

Chemical and Process Engineering

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Knowledge of the fluid dynamic characteristics in a stirred vessel is essential for reliable design and scale-up of a mixing system. In this paper, 3D hydrodynamics in a vessel agitated by a Rushton turbine were numerically studied (with the help of a CFD computer program (CFX 13.0)). The study was carried out covering a wide Reynolds number range: 10 4 -10 5 . Computations, based on control volume method, were made using the k-ε model. Our main purpose was to investigate the effect of vessel configuration and agitation rates on the flow structure and power consumption. Three types of vessels were used: unbaffled, baffled and a vessel with slots placed at the external perimeter of its vertical wall. The effect of slot length has been investigated. The comparison of our predicted results with available experimental data shows a satisfactory agreement.

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“…Several researches have been conducted to evaluate the mixing and cavern characteristics of pseudoplastic fluids [5][6][7][8][9][10][11]. Mathematical models were also proposed to predict the cavern size and development, which mainly include the spherical model, cylindrical model [12], and torus model [13].…”

Section: Introductionmentioning

confidence: 99%

Cavern Boundary Determination with Pseudoplastic Fluid Based on the Apparent Viscosity Method

et al. 2020

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The cavern characteristics of xanthan gum solutions stirred by impellers of a perturbed six‐bent‐bladed turbine (6PBT) were investigated numerically using computational fluid dynamics (CFD) with laminar flow model. The apparent viscosity method was proposed to determine the boundary of the cavern. The cavern sizes predicted by apparent viscosity were in good agreement with the calculated results, and this method was not influenced by speed and impeller configuration. However, the predicted results of the cavern by the traditional speed method usually displayed a great deviation, especially at high speed. Therefore, it is feasible to determine the cavern boundary with the apparent viscosity, i.e., 0.25 times the yield viscosity of a pseudoplastic fluid, as the unified standard.

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Numerical study of fluid flow and power consumption in a stirred vessel with a Scaba 6SRGT impeller

Cited by 23 publications

References 36 publications

Effect of Different Impellers and Baffles on Aerobic Stirred Tank Fermenter using Computational Fluid Dynamics

Effect of Different Impellers and Baffles on Aerobic Stirred Tank Fermenter using Computational Fluid Dynamics

Effect of Some Design Parameters on the Flow Fields and Power Consumption in a Vessel Stirred by a Rushton Turbine

Cavern Boundary Determination with Pseudoplastic Fluid Based on the Apparent Viscosity Method

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