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Title: Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
Authors: Feng, Huicheng
Wong, Teck Neng
Keywords: Engineering::Mechanical engineering
Issue Date: 2019
Source: Feng, H., & Wong, T. N. (2019). Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions. Physical Review E, 100(1), 013105-. doi:10.1103/PhysRevE.100.013105
Journal: Physical Review E
Abstract: This paper reports an interesting net fluid flow in the induced-charge electro-osmosis (ICEO) of poly(sodium 4-styrenesulfonate) (NaPSS) solutions measured through microparticle image velocimetry (μPIV). The net fluid flow is attributed to the significantly unequal cations and poly-anions of NaPSS. Owing to the phase delay effect of ions, different flow patterns appear with the alternating electric field. The inflow velocity and outflow velocity are found to be unequal and their relative magnitude shows a dependence on the electric field strength. The ICEO velocity is positively correlated with the NaPSS concentration. As NaPSS introduces the non-Newtonian effect, the well-known quadratic relationship between ICEO velocity and electric field strength in Newtonian fluids breaks. The ICEO velocity varies differently with the electric field strength as the NaPSS concentration changes. These new findings can contribute to the understanding of ICEO of complex fluids, e.g., biofluids.
ISSN: 2470-0045
DOI: 10.1103/PhysRevE.100.013105
Rights: © 2019 American Physical Society. All rights reserved. This paper was published in Physical Review E and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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