Journal article 1117 views
Rheometry-on-a-chip: measuring the relaxation time of a viscoelastic liquid through particle migration in microchannel flows
Francesco Del Giudice 
,
Gaetano D'Avino,
Francesco Greco,
Ilaria De Santo,
Paolo A. Netti,
Pier Luca Maffettone
,
Gaetano D'Avino,
Francesco Greco,
Ilaria De Santo,
Paolo A. Netti,
Pier Luca Maffettone
Lab on a Chip, Volume: 15, Issue: 3, Pages: 783 - 792
Swansea University Author:
Francesco Del Giudice
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DOI (Published version): 10.1039/c4lc01157k
Abstract
A novel method to estimate the relaxation time of viscoelastic fluids, down to milliseconds, is here proposed. The adopted technique is based on the particle migration phenomenon occurring when the suspending viscoelastic fluid flows in microfluidic channels. The method is applied to measure the flu...
| Published in: | Lab on a Chip |
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| ISSN: | 1473-0197 1473-0189 |
| Published: |
2015
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa41006 |
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| Abstract: |
A novel method to estimate the relaxation time of viscoelastic fluids, down to milliseconds, is here proposed. The adopted technique is based on the particle migration phenomenon occurring when the suspending viscoelastic fluid flows in microfluidic channels. The method is applied to measure the fluid relaxation times of two water–glycerol polymer solutions in an ample range of concentrations. A remarkable improvement in the accuracy of the measure of the relaxation time is found, as compared with experimental data obtained from shear or elongational experiments available in the literature. Good agreement with available theoretical predictions is also found. The proposed method is reliable, handy and does not need a calibration curve, opening an effective way to measure relaxation times of viscoelastic fluids otherwise not easily detectable by conventional techniques. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
3 |
| Start Page: |
783 |
| End Page: |
792 |