Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary
© 2019 American Physical Society. Using the observation that slip in simple fluids at low and moderate shear rates is a thermally activated process driven by the shear stress in the fluid close to the solid boundary, we develop a molecular-kinetic model for simple fluid slip at solid boundaries. The...
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| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/136511 |
| _version_ | 1826205036935380992 |
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| author | Wang, Gerald J 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 Hadjiconstantinou, Nicolas G |
| author_sort | Wang, Gerald J |
| collection | MIT |
| description | © 2019 American Physical Society. Using the observation that slip in simple fluids at low and moderate shear rates is a thermally activated process driven by the shear stress in the fluid close to the solid boundary, we develop a molecular-kinetic model for simple fluid slip at solid boundaries. The proposed model, which is in the form of a universal scaling relation that connects slip and shear rate, reduces to the well-known Navier slip condition under low shear conditions, providing a direct connection between molecular parameters and the slip length. Molecular-dynamics simulations are in very good agreement with the predicted dependence of slip on system parameters, including the temperature and fluid-solid interaction strength. Connections between our model and previous work, as well as simulation and experimental results, are explored and discussed. |
| first_indexed | 2024-09-23T13:06:03Z |
| format | Article |
| id | mit-1721.1/136511 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:06:03Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1365112023-02-17T16:13:10Z Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary Wang, Gerald J Hadjiconstantinou, Nicolas G Massachusetts Institute of Technology. Department of Mechanical Engineering © 2019 American Physical Society. Using the observation that slip in simple fluids at low and moderate shear rates is a thermally activated process driven by the shear stress in the fluid close to the solid boundary, we develop a molecular-kinetic model for simple fluid slip at solid boundaries. The proposed model, which is in the form of a universal scaling relation that connects slip and shear rate, reduces to the well-known Navier slip condition under low shear conditions, providing a direct connection between molecular parameters and the slip length. Molecular-dynamics simulations are in very good agreement with the predicted dependence of slip on system parameters, including the temperature and fluid-solid interaction strength. Connections between our model and previous work, as well as simulation and experimental results, are explored and discussed. 2021-10-27T20:35:44Z 2021-10-27T20:35:44Z 2019 2020-07-17T18:12:41Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136511 en 10.1103/PHYSREVFLUIDS.4.064201 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 Hadjiconstantinou, Nicolas G Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary |
| title | Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary |
| title_full | Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary |
| title_fullStr | Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary |
| title_full_unstemmed | Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary |
| title_short | Universal molecular-kinetic scaling relation for slip of a simple fluid at a solid boundary |
| title_sort | universal molecular kinetic scaling relation for slip of a simple fluid at a solid boundary |
| url | https://hdl.handle.net/1721.1/136511 |
| work_keys_str_mv | AT wanggeraldj universalmolecularkineticscalingrelationforslipofasimplefluidatasolidboundary AT hadjiconstantinounicolasg universalmolecularkineticscalingrelationforslipofasimplefluidatasolidboundary |