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Test of steady-state fluctuation theorem in turbulent Rayleigh-Bénard convection

Test of steady-state fluctuation theorem in turbulent Rayleigh-Bénard convection The local entropy production rate σ ( r , t ) in turbulent thermal convection is obtained from simultaneous velocity and temperature measurements in an aspect-ratio-one cell filled with water. The statistical properties of the time-averaged σ ( r , t ) are analyzed and the results are compared with the predictions of the steady-state fluctuation theorem (SSFT) of Gallavotti and Cohen. The experiment reveals that the SSFT can indeed be extended to the local variables, but further development is needed in order to incorporate the common dynamic complexities of far-from-equilibrium systems into the theory. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review E American Physical Society (APS)

Test of steady-state fluctuation theorem in turbulent Rayleigh-Bénard convection

Physical Review E , Volume 72 (1) – Jul 1, 2005
4 pages

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Publisher
American Physical Society (APS)
Copyright
Copyright © 2005 The American Physical Society
ISSN
1550-2376
DOI
10.1103/PhysRevE.72.015301
pmid
16090027
Publisher site
See Article on Publisher Site

Abstract

The local entropy production rate σ ( r , t ) in turbulent thermal convection is obtained from simultaneous velocity and temperature measurements in an aspect-ratio-one cell filled with water. The statistical properties of the time-averaged σ ( r , t ) are analyzed and the results are compared with the predictions of the steady-state fluctuation theorem (SSFT) of Gallavotti and Cohen. The experiment reveals that the SSFT can indeed be extended to the local variables, but further development is needed in order to incorporate the common dynamic complexities of far-from-equilibrium systems into the theory.

Journal

Physical Review EAmerican Physical Society (APS)

Published: Jul 1, 2005

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