Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/18783
Title: Diffusion in stationary flow from mesoscopic nonequilibrium thermodynamics
Author: Santamaría Holek, Iván
Reguera, D. (David)
Rubí Capaceti, José Miguel
Keywords: Física estadística
Termodinàmica
Sistemes no lineals
Química física
Statistical physics
Thermodynamics
Nonlinear systems
Physical and theoretical chemistry
Issue Date: 2001
Publisher: The American Physical Society
Abstract: We analyze the diffusion of a Brownian particle in a fluid under stationary flow. By using the scheme of nonequilibrium thermodynamics in phase space, we obtain the Fokker-Planck equation that is compared with others derived from the kinetic theory and projector operator techniques. This equation exhibits violation of the fluctuation-dissipation theorem. By implementing the hydrodynamic regime described by the first moments of the nonequilibrium distribution, we find relaxation equations for the diffusion current and pressure tensor, allowing us to arrive at a complete description of the system in the inertial and diffusion regimes. The simplicity and generality of the method we propose makes it applicable to more complex situations, often encountered in problems of soft-condensed matter, in which not only one but more degrees of freedom are coupled to a nonequilibrium bath.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.63.051106
It is part of: Physical Review E, 2001, vol. 63, núm. 5, p. 051106-1-051106-7
URI: http://hdl.handle.net/2445/18783
ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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