Título:
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Diffusion in stationary flow from mesoscopic nonequilibrium thermodynamics
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Autor/a:
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Santamaría Holek, Iván; Reguera, D. (David); Rubí Capaceti, José Miguel
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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. |
Materia(s):
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-Física estadística -Termodinàmica -Sistemes no lineals -Química física -Statistical physics -Thermodynamics -Nonlinear systems -Physical and theoretical chemistry |
Derechos:
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(c) American Physical Society, 2001
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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The American Physical Society
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