Numerical investigation of the mixing efficiency of the Ekato Paravisc impeller

Iranshahi, Arash; Heniche, Mourad; Bertrand, François; Tanguy, Philippe A.

doi:10.1016/j.ces.2005.11.032

Cited by 48 publications

(31 citation statements)

References 12 publications

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“…The Maxblend TM constant is in the range of 15-20 (Stobiac et al, 2014, Patel et al, 2011, Fradette et al, 2007. The Paravisc TM impeller is also used in industrial applications dealing with highly viscous fluids, and its constant is significantly higher; it is approximately 30 (Iranshahi et al, 2006). Other common configurations for mixing of highly viscous non-Newtonian fluids are two coaxial impellers, a central one, such as the Scabba impeller or the Rushton turbine, and an external one, such as an anchor impeller.…”

Section: Power Consumptionmentioning

confidence: 99%

Computational fluid dynamic studies of mixers for highly viscous shear thinning fluids and PIV validation

Cortada-García

Weheliye

Dore

et al. 2018

Chemical Engineering Science

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Often, impellers almost as large as the tanks containing them and impeller blades equipped with holes are adopted in industry. In this work, we studied experimentally the main features of the flow generated by this type of impellers for a mixture of glycerol with a carbomeric gel by means of particle image velocimetry. The experiments were conducted at temperatures ranging from 40 to 60°C and impeller speeds ranging from 40 to 140 rpm. In all cases, the flow regime was laminar or in the transition region. We also used computational fluid dynamics simulations to describe the behaviour of the mixer, validating the results experimentally with good agreement. We used the numerical results to obtain information on the performance of the mixer, determining the locations and size of vigorous agitation zones and the local effect of the holes present on the impeller blades. The power curves of the mixer were obtained, and the mixer efficiency in terms of power consumption was found to be similar to other impellers used to mix highly viscous non-Newtonian fluids.

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Section: Power Consumptionmentioning

confidence: 99%

Computational fluid dynamic studies of mixers for highly viscous shear thinning fluids and PIV validation

Cortada-García

Weheliye

Dore

et al. 2018

Chemical Engineering Science

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“…The use of numerical simulations to investigate mixing dynamics and/or analyze a mixing operation is well established [13]. The fact that it provides an efficient and cost effective avenue to study details of the flow field generated by the impeller are some of the reasons for its growing popularity in mixing system design [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Using CFD and Ultrasonic velocimetry to Study the Mixing of Pseudoplastic Fluids with a Helical Ribbon Impeller

Ihejirika

Ein‐Mozaffari

2007

Chem Eng & Technol

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A commercial CFD package was used to simulate the 3D flow field generated in a cylindrical tank by a helical ribbon impeller. The study was carried out using a pseudoplastic fluid with yield stress in the laminar mixing region. Ultrasonic Doppler velocimetry (UDV), a noninvasive fluid flow measurement technique for opaque systems, was used to measure xanthan gum velocity. From flow field calculations and tracer homogenization simulations, power consumption and mixing time results were obtained. The torque and power characteristics remain the same for upward and downward pumping of the impeller, but the mixing times are considerably longer for the downward pumping mode. Overall, the numerical results showed good agreement with experimental results and correlations developed by other researchers. From the power and mixing time results, two efficiency criteria were utilized to determine the best pumping mode of the impeller.

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“…For shear-thinning non-Newtonian fluids with no or negligible elasticity, some researchers [21][22][23] In this study, several fictitious power law fluids were investigated according to Kelly and Gigas [24].…”

Section: Rheological Modelmentioning

confidence: 99%

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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Numerical investigation of the mixing efficiency of the Ekato Paravisc impeller

Cited by 48 publications

References 12 publications

Computational fluid dynamic studies of mixers for highly viscous shear thinning fluids and PIV validation

Computational fluid dynamic studies of mixers for highly viscous shear thinning fluids and PIV validation

Using CFD and Ultrasonic velocimetry to Study the Mixing of Pseudoplastic Fluids with a Helical Ribbon Impeller

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

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