We analyze the effect of boundary conditions in the Rayleigh spectrum of a fluid under a temperature gradient. A specific wave vector geometry prevents coupling between temperature and velocity fluctuations and could make boundary effects observable. These effects are introduced by means of...

In a fluid in elongational flow the diffusion of tagged particles differs from the same process in an equilibrium fluid. The diffusion coefficient becomes direction, frequency, wave vector and elongation rate dependent. In the context of nonequilibrium fluctuating hydrodynamics explicit...

Voltage fluctuations near Gunn threshold are analyzed by introducing a model which takes into account the presence of inhomogeneities in the donor density. Correlation functions in different representations are computed and critical behavior is discussed. Our results are compared with Keizer's...

Some aspects of the linear chain of harmonic oscillators (“harmonic liquid”) are studied. In particular we compute the stationary correlation functions of coordinates and momenta of the oscillators for a particular non-equilibrium steady state. We find that the coordinates and momenta...

In this paper we introduce some of the main ideas over transport phenomena in suspensions of ferromagnetic particles. In particular, an explicit calculation of the viscosities for spherical particles, based on a solution of the corresponding Smoluchowski equation, is carried out and compared...

We analyze the effect of an external flow on the rheological and magnetic properties of a suspension of non-interacting magnetic dipoles in a Newtonian non-polar fluid (ferrofluid). The friction for a dipole moving through this fluid, which is in a state of elongational flow, is computed. A...

Fluctuations about homogeneous and inhomogeneous non-equilibrium steady states near Gunn instability are studied. Density and electric field autocorrelation functions in Fourier and real spaces are calculated in the framework of generalized Landau-Lifshitz fluctuating hydrodynamics. Some...

We study the propagation of the temperature fluctuations in a system in the presence of an interface. Such fluctuations originate from surface noise sources which are introduced through the random parts of the interfacial currents which satisfy fluctuation-dissipation theorems. The formal...

By considering an ensemble of Brownian particles suspended in a heat bath as a thermodynamic system with an internal degree of freedom it is possible to obtain the Fokker-Planck equation for Brownian motion in a temperature gradient, by applying the scheme of non-equilibrium thermodynamics. We...

Our previous work in which we have computed the stationary correlation functions of positions and momenta in the “harmonic liquid” is now extended to get the expressions of the time-dependent correlation functions of such quantities. The static and dynamic structure factors are computed. The...