Non-equilibrium Casimir-like Forces in Liquid Mixtures

Autor:	Kirkpatrick, T. R., de Zárate, J. M. Ortiz, Sengers, J. V.
Rok vydání:	2015
Předmět:	Condensed Matter - Statistical Mechanics Condensed Matter - Soft Condensed Matter Physics - Chemical Physics
Zdroj:	Physical Review Letters, 115 (2015) 035901
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.115.035901
Popis:	In this Letter we consider a liquid mixture confined between two thermally conducting walls subjected to a stationary temperature gradient. While in a one-component liquid non-equilibrium fluctuation forces appear inside the liquid layer only, non-equilibrium fluctuations in a mixture induce a Casimir-like force on the walls. The physical reason is that the temperature gradient induces large concentration fluctuations through the Soret effect. Unlike temperature fluctuations, non-equilibrium concentration fluctuations are also present near a perfectly thermally conducting wall. The magnitude of the fluctuation-induced Casimir force is proportional to the square of the Soret coefficient and is related to the concentration dependence of the heat and volume of mixing. Comment: 5 pages, 1 figure
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1503.03878 Zobrazit plný text záznamu View this record from Arxiv