Flow Characteristics of a "Multiconfigurational", Shear Thinning Viscoelastic Fluid with Particular Reference to the Orthogonal Rheometer

2000 ◽  
Vol 13 (5) ◽  
pp. 305-325 ◽  
Author(s):  
A.R. Srinivasa
Keyword(s):  
Viscoelastic Fluid ◽  
Flow Characteristics ◽  
Shear Thinning ◽  
Orthogonal Rheometer

Flow characteristics inside shear thinning xanthan gum non-Newtonian droplets moving in rectangular microchannels

2021 ◽  
Vol 62 (10) ◽  
Author(s):  
Mengqi Li ◽  
Zhaomiao Liu ◽  
Yan Pang ◽  
Ju Wang ◽  
Yao Lu ◽  
...  
Keyword(s):  
Xanthan Gum ◽  
Flow Characteristics ◽  
Shear Thinning ◽  
Rectangular Microchannels

Reversible Control of Thermal Flow Characteristics Using Viscoelastic Fluid with Photosensitivity

2018 ◽  
Vol 2018.93 (0) ◽  
pp. 806
Author(s):  
Shojiro ISONO ◽  
Takanori ISHII ◽  
Reiko KURIYAMA ◽  
Kazuya TATSUMI ◽  
Kazuyoshi NAKABE
Keyword(s):  
Viscoelastic Fluid ◽  
Flow Characteristics ◽  
Thermal Flow

scholarly journals Effects of Ionic Strength on Lateral Particle Migration in Shear-Thinning Xanthan Gum Solutions

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 535 ◽  
Author(s):  
Mira Cho ◽  
Sun Ok Hong ◽  
Seung Hak Lee ◽  
Kyu Hyun ◽  
Ju Min Kim
Keyword(s):  
Ionic Strength ◽  
Rheological Properties ◽  
Viscoelastic Fluid ◽  
Xanthan Gum ◽  
Viscoelastic Fluids ◽  
Shear Thinning ◽  
Particle Migration ◽  
Cell Counting ◽  
Contour Length ◽  
Wide Range

Viscoelastic fluids, including particulate systems, are found in various biological and industrial systems including blood flow, food, cosmetics, and electronic materials. Particles suspended in viscoelastic fluids such as polymer solutions migrate laterally, forming spatially segregated streams in pressure-driven flow. Viscoelastic particle migration was recently applied to microfluidic technologies including particle counting and sorting and the micromechanical measurement of living cells. Understanding the effects on equilibrium particle positions of rheological properties of suspending viscoelastic fluid is essential for designing microfluidic applications. It has been considered that the shear-thinning behavior of viscoelastic fluid is a critical factor in determining the equilibrium particle positions. This work presents the lateral particle migration in two different xanthan gum-based viscoelastic fluids with similar shear-thinning viscosities and the linear viscoelastic properties. The flexibility and contour length of the xanthan gum molecules were tuned by varying the ionic strength of the solvent. Particles suspended in flexible and short xanthan gum solution, dissolved at high ionic strength, migrated toward the corners in a square channel, whereas particles in the rigid and long xanthan gum solutions in deionized water migrated toward the centerline. This work suggests that the structural properties of polymer molecules play significant roles in determining the equilibrium positions in shear-thinning fluids, despite similar bulk rheological properties. The current results are expected to be used in a wide range of applications such as cell counting and sorting.

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