scholarly journals Effect of Geometry Design on Mixing Performance of Newtonian Fluids using Helical Overlapped Mixer Elements in Kenics Static Mixer

2021 ◽  
Vol 14 (6) ◽  
Keyword(s):  
Newtonian Fluids ◽  
Static Mixer ◽  
Mixing Performance ◽  
Geometry Design

scholarly journals Experimental studies on hydrodynamic aspects for mixing of non-Newtonian fluids in a Komax static mixer

2020 ◽  
pp. 9-9
Author(s):  
D. Revathi ◽  
K. Saravanan
Keyword(s):  
Fluid Flow ◽  
Pressure Drop ◽  
Unit Length ◽  
Continuous Process ◽  
Experimental Studies ◽  
Vital Role ◽  
Newtonian Fluids ◽  
Static Mixer ◽  
Static Mixers ◽  
Mixing Performance

Mixing is the degree of homogeneity of two or more phases and it plays a vital role in the quality of the final product. It is conventionally carried out by mechanical agitators or by static mixers. Static mixers are a series of geometric mixing elements fixed within a pipe, which use the energy of the flow stream to create mixing between two or more fluids or to inject metered liquid into a continuous process. The objective of this work is to predict hydrodynamic aspects of the static mixer designed. The mixing performance of Komax static mixer has been determined for the blending of non-Newtonian fluid streams with identical or different rheology by using experimental study. The energy needed for mixing comes from the force created by the liquid due to turbulence and the geometry of the static mixer. Pressure drop in static mixer depend strongly on geometric arrangement of the inserts, properties of fluids to be mixed and flow conditions. Hence pressure drop studies are carried out for different flow rates of fluids with different concentrations of two non-Newtonian fluids. Starch and xanthan gum solutions are used as working fluids. It is observed from the experimental results that the pressure drop per unit length increases as the fluid flow rate increases and the nature of fluid flow varies with the velocity of the fluids.

scholarly journals Effect of Aspect Ratio on the Mixing Performance in the Kenics Static Mixer

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 464
Author(s):  
Xingren Jiang ◽  
Ning Yang ◽  
Rijie Wang
Keyword(s):  
Pharmaceutical Industry ◽  
Aspect Ratio ◽  
Flow Reactor ◽  
Mixing Time ◽  
Continuous Process ◽  
Scale Up ◽  
Influence Factors ◽  
Continuous Manufacturing ◽  
Static Mixer ◽  
Mixing Performance

Continuous manufacturing has received increasing interest because of the advantages of intrinsic safety and enhanced mass transfer in the pharmaceutical industry. However, the difficulty for scale-up has limited the application of continuous manufacturing for a long time. Recently, the tubular flow reactor equipped with the Kenics static mixer appears to be a solution for the continuous process scale-up. Although many influence factors on the mixing performance in the Kenics static mixer have been investigated, little research has been carried out on the aspect ratio. In this study, we used the coefficient of variation as the mixing evaluation index to investigate the effect of the aspect ratio (0.2–2) on the Kenics static mixer’s mixing performance. The results indicate that a low aspect ratio helps obtain a shorter mixing time and mixer length. This study suggests that adjusting the aspect ratio of the Kenics static mixer can be a new strategy for the scale-up of a continuous process in the pharmaceutical industry.

scholarly journals Use of an areal distribution of mixing intensity to describe blending of non-newtonian fluids in a kenics KM static mixer using PLIF

AIChE Journal ◽  
2013 ◽  
Vol 60 (1) ◽  
pp. 332-342 ◽  
Author(s):  
F. Alberini ◽  
M. J. H. Simmons ◽  
A. Ingram ◽  
E. H. Stitt
Keyword(s):  
Newtonian Fluids ◽  
Static Mixer ◽  
Areal Distribution ◽  
Mixing Intensity

Improving mixing performance by curved‐blade static mixer

AIChE Journal ◽  
2020 ◽  
Vol 66 (11) ◽  
Author(s):  
Hassan Mahmoodi ◽  
Kiyanoosh Razzaghi ◽  
Farhad Shahraki
Keyword(s):  
Static Mixer ◽  
Mixing Performance ◽  
Curved Blade

A study of mixing performance of polyacrylamide solutions in a new-type static mixer combination

2015 ◽  
Vol 88 ◽  
pp. 19-28 ◽  
Author(s):  
Luhong Zhang ◽  
Jiaxin Dong ◽  
Bin Jiang ◽  
Yongli Sun ◽  
Fang Zhang ◽  
...  
Keyword(s):  
Static Mixer ◽  
Mixing Performance ◽  
New Type

scholarly journals Mixing performance of viscoelastic fluids in a Kenics KM in-line static mixer

2016 ◽  
Vol 115 ◽  
pp. 310-324 ◽  
Author(s):  
J. Ramsay ◽  
M.J.H. Simmons ◽  
A. Ingram ◽  
E.H. Stitt
Keyword(s):  
Viscoelastic Fluids ◽  
Static Mixer ◽  
Mixing Performance

Numerical Simulation and Mixing Study of Non-Newtonian Fluids in an Industrial Helical Static Mixer

2004 ◽  
Author(s):  
Ramin K. Rahmani ◽  
Theo G. Keith ◽  
Anahita Ayasoufi
Keyword(s):  
Reynolds Number ◽  
Pressure Drop ◽  
Single Phase ◽  
Engineering Application ◽  
Newtonian Fluids ◽  
Phase Reaction ◽  
Static Mixer ◽  
Fluid Type ◽  
Mixing Processes ◽  
Static Mixers

Static mixers are increasingly being used to perform a variety of mixing tasks in industries, ranging from simple blending to complex multi-phase reaction systems. Use of static mixers to process non-Newtonian fluids is quite common. Data on the pressure drop of non-Newtonian fluids in static mixers and the degree of mixing of materials through the mixer are very useful in the design and engineering application of these tools. This paper extends a previous study by the authors on an industrial helical static mixer and illustrates how static mixing processes of single-phase viscous liquids can be simulated numerically. A further aim is to provide an improved understanding of the flow pattern of non-Newtonian single-phase liquids through the mixer. A three-dimensional finite volume simulation is used to study the performance of the mixer. The non-Newtonian fluid is modeled by the Carreau law model for the shear stress. The effects of the Reynolds number of the flow and also properties of non-Newtonian fluids on the static mixer performance have been studied. The flow velocities, pressure drops, etc. are calculated for various flow rates. The computed pressure drop is in good agreement with existing experimental data. A comparison of the mixer performance for both Newtonian and non-Newtonian fluids is presented. It is shown that for low Reynolds number flows, the fluid type is less effective on the degree of mixing, while as flow Reynolds number increases and the viscosity decreases, it manifests more influence on the downstream mixing. It is also shown that the fluid type has a major impact on the pressure drop across the mixer.

Numerical Simulation and Mixing Study of Pseudoplastic Fluids in an Industrial Helical Static Mixer

2005 ◽  
Vol 128 (3) ◽  
pp. 467-480 ◽  
Author(s):  
Ramin K. Rahmani ◽  
Theo G. Keith ◽  
Anahita Ayasoufi
Keyword(s):  
Pressure Drop ◽  
Three Dimensional ◽  
Engineering Application ◽  
Newtonian Fluids ◽  
Static Mixer ◽  
Fluid Type ◽  
Mixing Processes ◽  
Static Mixers ◽  
Numerical Predictions ◽  
Pseudoplastic Fluids

Static mixers are increasingly being used to perform a variety of mixing tasks in industries, ranging from simple blending to complex multiphase reaction systems. Use of static mixers to process non-Newtonian fluids is quite common. Data on the pressure drop of non-Newtonian fluids in static mixers and the degree of mixing of materials through the mixer are very useful in the design and engineering application of these tools. This paper extends a previous study by the authors on an industrial helical static mixer and illustrates how static mixing processes of single-phase viscous liquids can be simulated numerically. A further aim is to provide an improved understanding of the flow pattern of pseudoplastic liquids through the mixer. A three-dimensional finite volume simulation is used to study the performance of the mixer. The flow velocities, pressure drops, etc., are calculated for various flow rates, using the Carreau and the power law models for non-Newtonian fluids. The numerical predictions by these two models are compared to existing experimental data. Also, a comparison of the mixer performance for both Newtonian and pseudoplastic fluids is presented. The effects of the Reynolds number of the flow and also properties of pseudoplastic fluids on the static mixer performance have been studied. It is shown that for the materials studied here, the fluid type is not effective on the degree of mixing. It is also shown that the fluid type has a major impact on the pressure drop across the mixer.

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