Vortices of electro-osmotic flow in heterogeneous porous media
© 2020 American Physical Society. Traditional models of electrokinetic transport in porous media are based on homogenized material properties, which neglect any macroscopic effects of microscopic fluctuations. This perspective is taken not only for convenience but also motivated by the expectation o...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/134437 |
| _version_ | 1826204875648663552 |
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| author | Mirzadeh, Mohammad Zhou, Tingtao Amooie, Mohammad Amin Fraggedakis, Dimitrios Ferguson, Todd R Bazant, Martin Z |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Mirzadeh, Mohammad Zhou, Tingtao Amooie, Mohammad Amin Fraggedakis, Dimitrios Ferguson, Todd R Bazant, Martin Z |
| author_sort | Mirzadeh, Mohammad |
| collection | MIT |
| description | © 2020 American Physical Society. Traditional models of electrokinetic transport in porous media are based on homogenized material properties, which neglect any macroscopic effects of microscopic fluctuations. This perspective is taken not only for convenience but also motivated by the expectation of irrotational electro-osmotic flow, proportional to the electric field, for uniformly charged surfaces (or constant ζ potential) in the limit of thin double layers. Here, we show that the inherent heterogeneity of porous media generally leads to macroscopic vortex patterns, which have important implications for convective transport and mixing. These vortical flows originate due to competition between pressure-driven and electro-osmotic flows, and their sizes are characterized by the correlation length of heterogeneity in permeability or surface charge. The appearance of vortices is controlled by a single dimensionless control parameter, defined as the ratio of a typical electro-osmotic velocity to the total mean velocity. |
| first_indexed | 2024-09-23T13:02:28Z |
| format | Article |
| id | mit-1721.1/134437 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:02:28Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1344372023-11-03T20:49:02Z Vortices of electro-osmotic flow in heterogeneous porous media Mirzadeh, Mohammad Zhou, Tingtao Amooie, Mohammad Amin Fraggedakis, Dimitrios Ferguson, Todd R Bazant, Martin Z Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Department of Mathematics © 2020 American Physical Society. Traditional models of electrokinetic transport in porous media are based on homogenized material properties, which neglect any macroscopic effects of microscopic fluctuations. This perspective is taken not only for convenience but also motivated by the expectation of irrotational electro-osmotic flow, proportional to the electric field, for uniformly charged surfaces (or constant ζ potential) in the limit of thin double layers. Here, we show that the inherent heterogeneity of porous media generally leads to macroscopic vortex patterns, which have important implications for convective transport and mixing. These vortical flows originate due to competition between pressure-driven and electro-osmotic flows, and their sizes are characterized by the correlation length of heterogeneity in permeability or surface charge. The appearance of vortices is controlled by a single dimensionless control parameter, defined as the ratio of a typical electro-osmotic velocity to the total mean velocity. 2021-10-27T20:05:00Z 2021-10-27T20:05:00Z 2020 2021-06-07T17:49:42Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/134437 en 10.1103/PhysRevFluids.5.103701 Physical Review Fluids Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Mirzadeh, Mohammad Zhou, Tingtao Amooie, Mohammad Amin Fraggedakis, Dimitrios Ferguson, Todd R Bazant, Martin Z Vortices of electro-osmotic flow in heterogeneous porous media |
| title | Vortices of electro-osmotic flow in heterogeneous porous media |
| title_full | Vortices of electro-osmotic flow in heterogeneous porous media |
| title_fullStr | Vortices of electro-osmotic flow in heterogeneous porous media |
| title_full_unstemmed | Vortices of electro-osmotic flow in heterogeneous porous media |
| title_short | Vortices of electro-osmotic flow in heterogeneous porous media |
| title_sort | vortices of electro osmotic flow in heterogeneous porous media |
| url | https://hdl.handle.net/1721.1/134437 |
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