Pressure is not a state function for generic active fluids
Pressure is the mechanical force per unit area that a confined system exerts on its container. In thermal equilibrium, it depends only on bulk properties—such as density and temperature—through an equation of state. Here we show that in a wide class of active systems the pressure depends on the prec...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2017
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| Online Access: | http://hdl.handle.net/1721.1/108342 https://orcid.org/0000-0002-1112-5912 |
| _version_ | 1826218012046262272 |
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| author | Solon, A. P. Fily, Y. Baskaran, A. Cates, M. E. Kafri, Y. Tailleur, J. Kardar, Mehran |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Solon, A. P. Fily, Y. Baskaran, A. Cates, M. E. Kafri, Y. Tailleur, J. Kardar, Mehran |
| author_sort | Solon, A. P. |
| collection | MIT |
| description | Pressure is the mechanical force per unit area that a confined system exerts on its container. In thermal equilibrium, it depends only on bulk properties—such as density and temperature—through an equation of state. Here we show that in a wide class of active systems the pressure depends on the precise interactions between the active particles and the confining walls. In general, therefore, active fluids have no equation of state. Their mechanical pressure exhibits anomalous properties that defy the familiar thermodynamic reasoning that holds in equilibrium. The pressure remains a function of state, however, in some specific and well-studied active models that tacitly restrict the character of the particle–wall and/or particle–particle interactions. |
| first_indexed | 2024-09-23T17:12:26Z |
| format | Article |
| id | mit-1721.1/108342 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:12:26Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1083422022-10-03T11:09:21Z Pressure is not a state function for generic active fluids Solon, A. P. Fily, Y. Baskaran, A. Cates, M. E. Kafri, Y. Tailleur, J. Kardar, Mehran Massachusetts Institute of Technology. Department of Physics Kardar, Mehran Pressure is the mechanical force per unit area that a confined system exerts on its container. In thermal equilibrium, it depends only on bulk properties—such as density and temperature—through an equation of state. Here we show that in a wide class of active systems the pressure depends on the precise interactions between the active particles and the confining walls. In general, therefore, active fluids have no equation of state. Their mechanical pressure exhibits anomalous properties that defy the familiar thermodynamic reasoning that holds in equilibrium. The pressure remains a function of state, however, in some specific and well-studied active models that tacitly restrict the character of the particle–wall and/or particle–particle interactions. National Science Foundation (U.S.) (DMR-12-06323) 2017-04-21T15:44:35Z 2017-04-21T15:44:35Z 2015-06 2015-01 Article http://purl.org/eprint/type/JournalArticle 1745-2473 1745-2481 http://hdl.handle.net/1721.1/108342 Solon, A. P.; Fily, Y.; Baskaran, A.; Cates, M. E.; Kafri, Y.; Kardar, M. and Tailleur, J. “Pressure Is Not a State Function for Generic Active Fluids.” Nature Physics 11, no. 8 (June 29, 2015): 673–678. © 2014 Macmillan Publishers Limited, part of Springer Nature https://orcid.org/0000-0002-1112-5912 en_US http://dx.doi.org/10.1038/nphys3377 Nature Physics 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 Nature Publishing Group arXiv |
| spellingShingle | Solon, A. P. Fily, Y. Baskaran, A. Cates, M. E. Kafri, Y. Tailleur, J. Kardar, Mehran Pressure is not a state function for generic active fluids |
| title | Pressure is not a state function for generic active fluids |
| title_full | Pressure is not a state function for generic active fluids |
| title_fullStr | Pressure is not a state function for generic active fluids |
| title_full_unstemmed | Pressure is not a state function for generic active fluids |
| title_short | Pressure is not a state function for generic active fluids |
| title_sort | pressure is not a state function for generic active fluids |
| url | http://hdl.handle.net/1721.1/108342 https://orcid.org/0000-0002-1112-5912 |
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