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....
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/141941 |
| _version_ | 1826127419547844608 |
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| author | Feng, Huicheng Wong, Teck Neng |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Feng, Huicheng Wong, Teck Neng |
| author_sort | Feng, Huicheng |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T07:08:35Z |
| format | Journal Article |
| id | ntu-10356/141941 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:08:35Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | 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 |
| topic | Engineering::Mechanical engineering Electrokinetic Flows Non-Newtonian Fluids |
| url | https://hdl.handle.net/10356/141941 |
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