Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions

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....

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Main Authors: Feng, Huicheng, Wong, Teck Neng
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/141941
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1419412023-03-04T17:20:52Z Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions Feng, Huicheng Wong, Teck Neng School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Electrokinetic Flows Non-Newtonian Fluids 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. MOE (Min. of Education, S’pore) Published version 2020-06-12T02:44:05Z 2020-06-12T02:44:05Z 2019 Journal Article 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 2470-0045 https://hdl.handle.net/10356/141941 10.1103/PhysRevE.100.013105 31499862 2-s2.0-85070098338 1 100 en Physical Review E © 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. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Electrokinetic Flows
Non-Newtonian Fluids
spellingShingle Engineering::Mechanical engineering
Electrokinetic Flows
Non-Newtonian Fluids
Feng, Huicheng
Wong, Teck Neng
Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
description 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.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Feng, Huicheng
Wong, Teck Neng
format Article
author Feng, Huicheng
Wong, Teck Neng
author_sort Feng, Huicheng
title Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
title_short Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
title_full Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
title_fullStr Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
title_full_unstemmed Net fluid flow and non-Newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
title_sort net fluid flow and non-newtonian effect in induced-charge electro-osmosis of polyelectrolyte solutions
publishDate 2020
url https://hdl.handle.net/10356/141941
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