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Showing 1 to 13 of 13 for “"Rushton turbine"”.
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The effects of tank size and impeller type on turbulent flocculation
… ($\approx$560L) with two impeller types (Rushton turbine and A310 fluid foil impeller) were evaluated experimentally using a laser Doppler velocimeter and numerically using a computational fluid dynamic software called FIDAP. The results of both the experimental and numerical …
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Experimental and simulation studies of two-phase flow in a stirred tank
… stirred vessel with two types of impeller: Rushton turbine and 45⁰ pitched-blade turbine."--Introduction, page 4.
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Development of a CFD model for stirred tank applications
… CFD code, FLUENT 6.2, is used to model a Rushton turbine-agitated stirred tank with T = 0.14 m.
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A hydrodynamic study of nickel suspension in stirred tanks
… mixing was investigated in a tank stirred by a Rushton turbine. The standard k-f. model gave better overall predictions of mean velocity fields than the k-ro and RNG k-f. models. The CFD simulation and experimental results obtained with the laser Doppler velocimetry (LDV) method showed that …
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A novel reactor with two independently-driven impellers for gas-liquid processing
… single or multiple impellers, traditionally Rushton turbines mounted on a common shaft. This configuration is satisfactory for low viscosity systems, e.g. yeast and some bacterial fermentations. However, in cultures of filamentous fungi, as the fermentation time progresses, the broth may …
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Turbulent mixing of unpremixed reactants in stirred tanks.
… liquid streams in a standard tank stirred by a Rushton turbine has been studied. Experimental measurements of concentration and segregation (fluctuating concentration) have been made for both reacting and non-reacting flows. For the non-reacting case, one stream was marked with a fluorescent …
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Multiphase CFD modelling of stirred tanks
Stirred tanks agitated with Rushton turbines are commonly used in industry, for instance mixing processes and flotation systems. The need for more efficient systems in industries has led to the study of fluid flow within the tanks upon agitation; so that a better understanding of the phenomena can …
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Turbulent Characteristics in Stirring Vessels: A Numerical Investigation
… rate) in a cylindrical vessel agitated by a Rushton turbine (a disk with six flat blades) and in a tank typical of flotation cells. Results from simulations using FLUENT (a commercial CFD package) are compared with Time Resolved Digital Particle Image Velocimetry (DPIV) for baseline …
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Multiphase Hydrodynamics in Flotation Systems
… to measure the turbulent velocity field in a Rushton turbine around the impeller region. The turbulence quantities were found by removing the periodic component from the blade passing, which is a dominant part of the measured velocities near the impeller. We provide evidence that larger, …
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Lagrangian studies of turbulent mixing in a vessel agitated by a rushron turbine: positron emission particle tracking (PEPT) and computational fluid dynamics (CFD)
… such as a standard baffled vessel stirred by a Rushton turbine. As part of the validation, comparison with Eulerian PIV/LDA data has been also undertaken and some underestimation of the high velocities in the system was found in the impeller region. By using a selective interpolation algorithm …
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High Resolution Simulation of Laminar and Transitional Flows in a Mixing Vessel
… the flow within a baffled tank containing a Rushton turbine of the standard configuration. For a Re based on impeller diameter and blade rotational speed (Re â ¡ Ï ND2/μ) the following flow regimes were identified and investigated in detail: Reverse/reciprocating flows at very low Re (<10); …
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Heterogeneous oxidation of alcohols
… the reaction rate. Eventually, the use of a Rushton Turbine at 20 rps with a shower disc sparger and a treated catalyst allowed the selectivity to reach 93%. The reaction could be described with a Power Law model satisfactorily. Transition Metal Oxide catalysts such as \(AgO/ SiO_2, …
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Agitation, mixing and mass transfer in simulated high viscosity fermentation broths
… agitator geometries were used. These were: Rushton turbines ( D = T/3 and D = T/2 ), used singly and in pairs; Intermig impellers ( D = 0.58T ), used as a pair; and a 45° pitched blade turbine ( D = T/2 ), used in combination with a Rushton turbine. Gas hold-up and gas-liquid flow patterns …