Nonequilibrium fluctuation-induced Casimir pressures in liquid mixtures

Abstract

In this article we derive expressions for Casimir-like pressures induced by nonequilibrium concentration fluctuations in liquid mixtures. The results are then applied to liquid mixtures in which the concentration gradient results from a temperature gradient through the Soret effect. A comparison is made between the pressures induced by nonequilibrium concentration fluctuations in liquid mixtures and those induced by nonequilibrium temperature fluctuations in one-component fluids. Some suggestions for experimental verification procedures are also presented.

9 pages, 3 figures

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• Nonequilibrium mixture dynamics: A model for mobilities and its consequences
• Lattice Boltzmann Simulations of Non-Equilibrium Fluctuations in a Non-Ideal Binary Mixture
• Driven active matter: fluctuations and a hydrodynamic instability