ORCID
Alison E. Patteson (Koser): 0000-0002-4004-1734
Document Type
Article
Date
Winter 2-28-2013
Language
English
Funder(s)
Penn NSF MRSEC
Funding ID
DMR-1120901
Acknowledgements
The authors thank D.J. Durian and X.N. Shen for helpful discussions as well as P. Szczesniak and H. Bau for assistance with the experimental setup. This work is supported by Penn NSF MRSEC (DMR-1120901).
Official Citation
Koser, A. E., Pan, L., Keim, N. C., & Arratia, P. E. (2013, February 28). Measuring material relaxation and creep recovery in a microfluidic device. Lab on a Chip. https://pubs.rsc.org/en/content/articlehtml/2013/lc/c3lc41379a
Disciplines
Physics
Description/Abstract
We present a novel method of testing creep recovery in a microfluidic device. This method allows for the measurement of relaxation time of fluids at low strain. After applying a steady pressure-driven flow along a microchannel, the pressure is released and the fluid is allowed to relax and come to rest. Local strains are observed via the time-dependent velocity profiles and are fit to a general viscoelastic model to obtain the fluids' relaxation times. The use of polymeric solutions of various molecular weights allows for the observation of time scales for strains ranging from 0.01 to 10. Results are consistent with data obtained in a macroscopic rheometer and with a viscoelastic constitutive model.
Recommended Citation
Koser, A. E., Pan, L., Keim, N. C., & Arratia, P. E. (2013, February 28). Measuring material relaxation and creep recovery in a microfluidic device. Lab on a Chip. https://pubs.rsc.org/en/content/articlehtml/2013/lc/c3lc41379a
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
