Finite element analysis of viscous mixing with a helical ribbon‐screw impeller

Tanguy, Philippe A.; Lacroix, R.; Bertrand, François; Choplin, Lionel; Fuente, E. Brito de la

doi:10.1002/aic.690380614

Cited by 58 publications

(37 citation statements)

References 9 publications

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“…The power curve of non-Newtonian fluids obtained using the Metzner-Otto method is consistent with that of Newtonian fluids, which explains the fact that the Metzner-Otto method is a widely used method to design impellers for non-Newtonian fluids applications [12,13]. As a result, the k s value has become a key factor to predict power consumption.…”

Section: Nd Resupporting

confidence: 52%

Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method

Zhang

Jiang

et al. 2008

Chinese Journal of Chemical Engineering

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Section: Nd Resupporting

confidence: 52%

Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method

Zhang

Jiang

et al. 2008

Chinese Journal of Chemical Engineering

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“…It consists of a cylindrical vessel (8 l) provided with a helical ribbon (HR) impeller set in motion at a rotating speed of 20 rev min À1 . The vessel is ®lled with a highly non-linear power-law¯uid with parameters m 3Á82 Pa s n and n 0Á16 in equation (5). Its density is 1000 kg m À3 .…”

Section: Three-dimensional Helical Ribbon Mixer Problemmentioning

confidence: 99%

“…Fortunately, for this kind of problem a steady solution can be obtained if the computation is carried out using the impeller viewpoint. 5 As a result, a single mesh is required.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional fictitious domain method for incompressible fluid flow problems

Bertrand

Tanguy

Thibault

1997

Int. J. Numer. Meth. Fluids

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156

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“…A helical ribbon screw impeller, i.e. a helical ribbon blade in the outer region and a screw blade attached to the impeller shaft, was under examination by Tanguy et al (1992). The entire volume of fluid in the tank is assumed to be mounted on a rotational frame in the simulation.…”

Section: Introductionmentioning

confidence: 99%

“…Another method to find Q d is to integrate the axial velocity profile obtained from measurements (Carreau et al, 1976;Tanguy et al, 1992). A circulation number K Q can be defined in terms of…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics in Mixers Agitated by Helical Ribbon Blade Impeller

Tsui¹,

2011

Engineering Applications of Computational Fluid Mechanics

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ABSTRACT:The main concern of this study is to investigate the flow mixing generated by helical ribbon blade impellers and to show that with the help of CFD the performance of the mixing system can be significantly improved by optimizing the geometric configuration of the impeller. To fulfill this objective, a numerical model is developed to solve the Navier-Stokes equations for the flow field. However, difficulties arise due to the rotation of the impeller in the vessel. In order to ease the problem, the velocity field is assumed to be in a quasi-steady state and the multiframe of reference is adopted to tackle the rotation of the impeller. For discretization the fully conservative finite volume method, together with unstructured grid technology, is incorporated. It is shown that the flow in the mixer can be regarded as a flow in an open channel with a wall moving at an angle with respect to the channel. The influences of the blade pitch, the blade width, and the clearance gap between the blade and the surrounding wall are examined. The mechanism to cause these effects is delineated in detail. It is demonstrated that after optimization of the blade geometry, the circulating flow rate induced by the impeller is largely increased, leading to significant reduction in mixing time. In addition, the power demand is reduced. It is also evidenced that by enlarging the clearance, it is difficult for the fluid in this region to be mixed.

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Finite element analysis of viscous mixing with a helical ribbon‐screw impeller

Cited by 58 publications

References 9 publications

Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method

Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method

A three-dimensional fictitious domain method for incompressible fluid flow problems

Flow Characteristics in Mixers Agitated by Helical Ribbon Blade Impeller

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