Rheometry-on-a-chip: measuring the relaxation time of a viscoelastic liquid through particle migration in microchannel flows

Lab on a Chip ◽  
2015 ◽  
Vol 15 (3) ◽  
pp. 783-792 ◽  
Author(s):  
Francesco Del Giudice ◽  
Gaetano D'Avino ◽  
Francesco Greco ◽  
Ilaria De Santo ◽  
Paolo A. Netti ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Viscoelastic Fluids ◽  
Viscoelastic Liquid ◽  
Particle Migration ◽  
Microchannel Flows ◽  
Novel Method

A novel method to estimate the relaxation time of viscoelastic fluids, down to milliseconds, is here proposed.

scholarly journals Correction: Rheometry-on-a-chip: measuring the relaxation time of a viscoelastic liquid through particle migration in microchannel flows

Lab on a Chip ◽  
2016 ◽  
Vol 16 (6) ◽  
pp. 1088-1088 ◽  
Author(s):  
Francesco Del Giudice ◽  
Gaetano D'Avino ◽  
Francesco Greco ◽  
Ilaria De Santo ◽  
Paolo A. Netti ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Viscoelastic Liquid ◽  
Particle Migration ◽  
Microchannel Flows

PERISTALTIC TRANSPORT OF MAXWELL VISCOELASTIC FLUIDS WITH A SLIP CONDITION: HOMOTOPY ANALYSIS OF GASTRIC TRANSPORT

2015 ◽  
Vol 15 (03) ◽  
pp. 1550021 ◽  
Author(s):  
D. TRIPATHI ◽  
O. ANWAR BÉG
Keyword(s):  
Relaxation Time ◽  
Frictional Force ◽  
Viscoelastic Fluids ◽  
Transport Processes ◽  
Peristaltic Transport ◽  
Slip Condition ◽  
Slip Parameter ◽  
Analytical Technique ◽  
Approximate Analytical Solutions ◽  
Homotopy Analysis

Viscoelastic fluids arise frequently in numerous biophysical transport processes including gastric flow, embryology, haemo-dynamics and synovial lubrication. In the present article, we examine the effect of slip condition on peristaltic transport of viscoelastic fluids with the fractional Maxwell model through a two-dimensional deformable channel under the long wavelength and low Reynolds number assumptions, as a simulation of gastric flow. The channel is subjected to sinusoidal waves traveling along the walls. A versatile semi-analytical technique, the homotopy analysis method (HAM) is used to obtain approximate analytical solutions for the non-dimensionalized flow problem. The convergence of the HAM which depends on ℏ-curves is illustrated for relevant parameters. The effects of fractional parameters, relaxation time and slip parameter on the pressure difference and frictional force across one wavelength against time and averaged flow rate are illustrated graphically. It is found that effect of both fractional parameters on pressure is opposite to each other. The relaxation time and slip parameter are found to assist the peristaltic transportation. The behavior of frictional force is found to be similar to pressure in a magnitude sense whereas it is opposite in direction.

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.

scholarly journals Particle migration and single-line particle focusing in microscale pipe flow of viscoelastic fluids

RSC Advances ◽  
2014 ◽  
Vol 4 (7) ◽  
pp. 3512-3520 ◽  
Author(s):  
Kyung Won Seo ◽  
Hyeok Jun Byeon ◽  
Hyung Kyu Huh ◽  
Sang Joon Lee
Keyword(s):  
Pipe Flow ◽  
Viscoelastic Fluids ◽  
Particle Migration ◽  
Single Line ◽  
Particle Focusing

scholarly journals Recent progress of particle migration in viscoelastic fluids

Lab on a Chip ◽  
2018 ◽  
Vol 18 (4) ◽  
pp. 551-567 ◽  
Author(s):  
Dan Yuan ◽  
Qianbin Zhao ◽  
Sheng Yan ◽  
Shi-Yang Tang ◽  
Gursel Alici ◽  
...  
Keyword(s):  
Recent Progress ◽  
Viscoelastic Fluids ◽  
Lab On A Chip ◽  
Particle Migration

In this review, we discuss the up-to-date progress of particle migration in viscoelastic fluids mainly from the aspect of applications, laying out a comprehensive perspective on their potential in future lab-on-a-chip platforms.

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