Finite-size effects on Soret-induced nonequilibrium concentration fluctuations in binary liquids



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Sengers, Jan V. and Ortiz de Zárate Leira, José María (2002) Finite-size effects on Soret-induced nonequilibrium concentration fluctuations in binary liquids. Revista mexicana de física, 48 . pp. 14-25. ISSN 0035-001X

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We consider a horizontal binary-liquid layer that is subjected to a stationary temperature gradient while still being maintained in a stable quiescent state without any convection. In such a thermal nonequilibrium state the Soret effect induces concentration fluctuations. In the present paper we show how the finite height of the liquid layer will affect the long-range nature of these nonequilibrium concentration fluctuations at very small wave numbers. Estimates of the wave numbers where light-scattering or shadowgraph experiments will be affected by finite-size effects are presented.

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This paper is dedicated to Professor Leopoldo García Colín Scherer on the occasion of his 70th birthday. The research at the University of Maryland is supported by the Chemical Sciences, Geosciences and Biosciences Division of the Office of Basic Energy Sciences of the US Department of Energy under Grant No. DE-FG-02-95ER14509.

Uncontrolled Keywords:Rayleigh-Benard convection; Extended irreversible thermodynamics; Light-scattering measurements; Stationary heat-flux; Thermal-equilibrium; Steady-state; Temperature-gradient; Diffusion-processes; Giant fluctuations; Polymer-Solution
Subjects:Sciences > Physics > Thermodynamics
ID Code:27393
Deposited On:24 Nov 2014 13:27
Last Modified:27 Jan 2016 16:10

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