Pressure is not a state function for generic active fluids
Name
Pressure is not.pdf
Size
1.57 MB
Format
Adobe PDF
Checksum (MD5)
5a84c7e0e731f43e4f4fd627c66ea2fc
Author(s)
Solon, A. P.
Fily, Y.
Baskaran, A.
Cates, M. E.
Kafri, Y.
Tailleur, J.
Kardar, Mehran
Date Issued
June 2015
Journal
Nature Physics
Publisher
Nature Publishing Group
Citation
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
Version
Author's final manuscript
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
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.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/nphys3377
