The influence of feeding location on the micromixing performance of novel large-double-blade impeller

Liu, Baoqing; Zheng, Yijun; Huang, Bolin; Qian, Luyan; Jin, Zhi Min

doi:10.1016/j.jtice.2015.02.012

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…It was concluded that the curved blades are more efficient than the straight blades. (Liu et al 2015) studied a mixing liquid in cylindrical tank by novel large-double-bladed impeller. The vessel bottom is curved.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Analyses of the Flow Patterns in Stirred Vessel of Two-Bladed Impeller

Laidoudi¹

2020

JSSCM

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In this paper, the governing equations of continuity and momentum subjected to suitable boundary conditions have been solved numerically to investigate the fluid flow in stirred vessel of two-bladed impeller. The numerical simulations have been carried out in three-dimensions for laminar flow. The studied fluid was considered Newtonian and incompressible. Our research studied the effects of geometrical configurations of the two-bladed impeller and its rotational speed on fluid patterns and mechanical power consumption. The innovative point in this paper is that the blades of the impeller contain three equal-sized holes of circular cross-section. The diameter of the hole (d) to the impeller diameter (D) gives the ratio d/D. the impeller speed is controlled by the Reynolds number (Re). The obtained results have been illustrated and discussed for the range of following governing parameters: d/D = 0 to 0.4 and Re = 1 to 300. The results showed that the studied parameters have significant effects on fluid flow and consumption power and the perforated blades of ratio d/D = 0.133 is more efficient than plan blades. Also, a new correlation is proposed to describe the consumption power as function of d/D and Re.

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Section: Introductionmentioning

confidence: 99%

Hydrodynamic Analyses of the Flow Patterns in Stirred Vessel of Two-Bladed Impeller

Laidoudi¹

2020

JSSCM

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“…Design of the impeller blade is an important parameter to be investigated in mixing systems [16][17][18][19][20][21][22][23][24]. Due to the different blade shapes available in industries, the fluid flows inside the vessel and the power consumed change, increasing the necessity of optimizing the blade geometry.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al [23] studied the performance of a novel large twobladed impeller, which is based on the Maxblend and Fullzone impellers. The new design has adaptability to viscous systems, as reported by these authors.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Operating and Design Conditions to Reduce the Power Consumption in a Vessel Stirred by a Paddle Impeller

Ameur¹,

Kamla

Sahel

2018

Period. Polytech. Mech. Eng.

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Design of the impeller blade is a determining factor in power consumption and mixing quality, which determines consequently the cost of the mixing operation. This study explores the flow patterns and the power required for stirring a Newtonian fluid by paddle impellers. Investigations are carried out via three dimensional (3D) numerical simulations. Effects of the blade curvature, blade diameter, blade number and Reynolds number are analyzed. The curved blade is found to be more efficient to reduce the power consumption, compared with the straight blade. A new correlation is proposed for predicting the power required with two-curved-bladed impellers. The straight and very large blade creates a dead zone in the space between the blade tip and the vertical wall of vessel. This issue may be overcome by the curved blade, which increases consequently the well-mixed region size. A wider well-mixed region may be obtained with the larger curved blade, but with an additional energy cost.

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“…According to the authors, the SST model with curvature correction is the most satisfactory turbulence model tested for predicting turbulent flow in stirred tanks, in terms of both computing time and accuracy. Liu et al [15] studied the performance of a large novel two-bladed impeller, which is based on Maxblend and Fullzone impellers. Zdenek Chara et al [16] studied the turbulent flow simulation of a standard Rushton turbine using a detached eddy simulation (DES) in the water fluid.…”

Section: Introductionmentioning

confidence: 99%

An Investigation into Different Power Consumption Parameters of Rushton Turbines: A Computational Survey

Ashory

Talebi

Ghadikolaei

et al. 2018

TFAMENA

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SummaryIn the present work, the mixing process of shear thinning liquids in a six-blade Rushton turbine is studied. A finite volume based computational fluid dynamics (CFD) simulation has been carried out and the three-dimensional turbulent flow is numerically analyzed by using the Shear Stress Transport k-ω (k-ω SST) model. Shear thinning liquids were investigated and shear thinning behaviour was modelled by the Ostwald-de Waele law. The used stirred vessel has a cylindrical shape with a flat bottom and the liquid height was kept equal to the vessel diameter. Effects of the power law index and the angle of attack of the blade on power consumption have been investigated. The results show that decreasing the angle of attack from 90° to 45° not only results in an increase in the flow rate down to the bottom of the vessel, resulting in a better mixture qualification, but also reduces the power consumption of the stirring process. To verify the simulation, axial, radial and tangential velocity components were compared with other experimental data and satisfactory agreement was found.

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The influence of feeding location on the micromixing performance of novel large-double-blade impeller

Cited by 8 publications

References 16 publications

Hydrodynamic Analyses of the Flow Patterns in Stirred Vessel of Two-Bladed Impeller

Hydrodynamic Analyses of the Flow Patterns in Stirred Vessel of Two-Bladed Impeller

Optimization of the Operating and Design Conditions to Reduce the Power Consumption in a Vessel Stirred by a Paddle Impeller

An Investigation into Different Power Consumption Parameters of Rushton Turbines: A Computational Survey

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