Equilibrium phenomena are characterized by time symmetry. Thermodynamic fluctuations are also time-symmetric at equilibrium. Conversely, diffusion of a solute in a liquid in the presence of a gradient is a nonequilibrium phenomenon, which gives rise to long-range fluctuations with amplitude much larger than the equilibrium one for small enough wave number. In the case of diffusion in binary mixtures such fluctuations are time-symmetric, notwithstanding the fact that they are generated by a nonequilibrium condition. In this paper, we investigate diffusion of two solutes in a ternary liquid mixture by means of fluctuating hydrodynamics theory. We show that the time-cross-correlation function of the concentrations is not time-symmetric, hence showing that time symmetry is violated for such nonequilibrium fluctuations. We discuss the feasibility of experiments aimed at the detection of the asymmetry of the cross-correlation function of nonequilibrium concentration fluctuations in ternary mixtures, as envisaged in the Giant Fluctuations (NEUF-DIX) microgravity project of the European Space Agency.
Asymmetric time-cross-correlation of nonequilibrium concentration fluctuations in a ternary liquid mixture / D. Brogioli, F. Croccolo, A. Vailati. - In: PHYSICAL REVIEW. E. - ISSN 2470-0045. - 99:5(2019), pp. 053115.1-053115.10.
|Titolo:||Asymmetric time-cross-correlation of nonequilibrium concentration fluctuations in a ternary liquid mixture|
BROGIOLI, DORIANO COSTANTINO (Primo) (Corresponding)
CROCCOLO, FABRIZIO (Secondo)
VAILATI, ALBERTO (Ultimo)
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Progetto:||ESA Topical Team Giant Fluctuations|
|Data di pubblicazione:||2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevE.99.053115|
|Appare nelle tipologie:||01 - Articolo su periodico|