Volume 68, Number 6, December 2004
|Page(s)||776 - 782|
|Published online||12 November 2004|
Forces induced by nonequilibrium fluctuations: The Soret-Casimir effect
Institute for Advanced Studies in Basic Sciences - Zanjan 45195-159, Iran
Accepted: 14 October 2004
The notion of fluctuation-induced forces is generalized to the cases where the fluctuations have nonequilibrium origin. It is shown that a net force is exerted on a single flat plate that restricts scale-free fluctuations of a scalar field in a temperature gradient. This force tends to push the object to the colder regions, which is a manifestation of thermophoresis or the Soret effect.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 82.70.-y – Disperse systems; complex fluids / 05.70.Jk – Critical point phenomena
© EDP Sciences, 2004
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