An experimental investigation of negative wakes behind spheres settling in a shear-thinning viscoelastic fluid

1998 ◽  
Vol 37 (4) ◽  
pp. 307-327 ◽  
Author(s):  
Mark T. Arigo ◽  
G. H. McKinley
Keyword(s):  
Experimental Investigation ◽  
Viscoelastic Fluid ◽  
Shear Thinning

A preliminary experimental investigation into the air-lift pumping of shear-thinning suspensions

1980 ◽  
Vol 58 (6) ◽  
pp. 42-51
Author(s):  
Nigel I. Heywood ◽  
Robert A. Michalowicz ◽  
Michael E. Charles
Keyword(s):  
Experimental Investigation ◽  
Shear Thinning ◽  
Air Lift

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.

Alignment and segregation of bidisperse colloids in a shear-thinning viscoelastic fluid under shear flow

2013 ◽  
Vol 101 (2) ◽  
pp. 28002 ◽  
Author(s):  
I. S. Santos de Oliveira ◽  
W. K. den Otter ◽  
W. J. Briels
Keyword(s):  
Shear Flow ◽  
Viscoelastic Fluid ◽  
Shear Thinning

scholarly journals EXPERIMENTAL INVESTIGATION OF GAS/SHEAR THINNING FLUID FLOW IN A HORIZONTAL PIPE

2020 ◽  
Author(s):  
Serag Moustafa M. Alfareq ◽  
Abinash Barooah ◽  
Mohammad Azizur Rahman ◽  
Sohrab Zendehboudi
Keyword(s):  
Experimental Investigation ◽  
Fluid Flow ◽  
Shear Thinning ◽  
Horizontal Pipe ◽  
Shear Thinning Fluid
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