Physics of nanoscale immiscible fluid displacement
© 2019 American Physical Society. We investigate immiscible fluid displacement at small scales where slip lengths are on the order of characteristic system sizes, whereby Cox's law is not expected to be valid. Molecular dynamics simulations show that in this limit hydrodynamic bending becomes s...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/136616 |
| _version_ | 1826212833222721536 |
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| author | Wang, Gerald J Damone, Angelo Benfenati, Francesco Poesio, Pietro Beretta, Gian Paolo Hadjiconstantinou, Nicolas G |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Wang, Gerald J Damone, Angelo Benfenati, Francesco Poesio, Pietro Beretta, Gian Paolo Hadjiconstantinou, Nicolas G |
| author_sort | Wang, Gerald J |
| collection | MIT |
| description | © 2019 American Physical Society. We investigate immiscible fluid displacement at small scales where slip lengths are on the order of characteristic system sizes, whereby Cox's law is not expected to be valid. Molecular dynamics simulations show that in this limit hydrodynamic bending becomes small and interfaces remain approximately spherical. In this case the only relevant angle for describing the interface shape is the dynamic microscopic angle at the fluid-solid interface. In our simulations, this angle is found to be described well by the molecular-kinetic theory originally proposed by Blake and Haynes. In general, this implies a different functional dependence between the contact angle (and related quantities) and the flow speed (or capillary number); this is demonstrated for the case of the force on the boundary for immiscible fluid displacement in a two-dimensional channel. |
| first_indexed | 2024-09-23T15:38:38Z |
| format | Article |
| id | mit-1721.1/136616 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:38:38Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1366162023-03-15T17:28:22Z Physics of nanoscale immiscible fluid displacement Wang, Gerald J Damone, Angelo Benfenati, Francesco Poesio, Pietro Beretta, Gian Paolo Hadjiconstantinou, Nicolas G Massachusetts Institute of Technology. Department of Mechanical Engineering © 2019 American Physical Society. We investigate immiscible fluid displacement at small scales where slip lengths are on the order of characteristic system sizes, whereby Cox's law is not expected to be valid. Molecular dynamics simulations show that in this limit hydrodynamic bending becomes small and interfaces remain approximately spherical. In this case the only relevant angle for describing the interface shape is the dynamic microscopic angle at the fluid-solid interface. In our simulations, this angle is found to be described well by the molecular-kinetic theory originally proposed by Blake and Haynes. In general, this implies a different functional dependence between the contact angle (and related quantities) and the flow speed (or capillary number); this is demonstrated for the case of the force on the boundary for immiscible fluid displacement in a two-dimensional channel. 2021-10-27T20:36:15Z 2021-10-27T20:36:15Z 2019 2020-07-17T18:07:19Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136616 en 10.1103/PHYSREVFLUIDS.4.124203 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 | Wang, Gerald J Damone, Angelo Benfenati, Francesco Poesio, Pietro Beretta, Gian Paolo Hadjiconstantinou, Nicolas G Physics of nanoscale immiscible fluid displacement |
| title | Physics of nanoscale immiscible fluid displacement |
| title_full | Physics of nanoscale immiscible fluid displacement |
| title_fullStr | Physics of nanoscale immiscible fluid displacement |
| title_full_unstemmed | Physics of nanoscale immiscible fluid displacement |
| title_short | Physics of nanoscale immiscible fluid displacement |
| title_sort | physics of nanoscale immiscible fluid displacement |
| url | https://hdl.handle.net/1721.1/136616 |
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