Showing 1 - 10 of 26
The effects of spatial heterogeneities on the slow dynamics of density fluctuations are discussed both in an equilibrium colloidal suspension and in a slightly nonequilibrium colloidal suspension. The long-lived, heterogeneous glassy domains appear near the glass transition and influence the...
Persistent link: https://www.econbiz.de/10011062605
Slow dynamics of equilibrium hard-sphere colloidal suspensions near the glass transition is discussed from a new viewpoint by numerically solving a cubic nonlinear stochastic diffusion equation for the density fluctuation recently proposed by one of the present authors (MT). The important role...
Persistent link: https://www.econbiz.de/10010589801
A systematic theory for the dynamics of hard-sphere suspensions of interacting Brownian particles with both hydrodynamic and direct interactions is presented. A generalized diffusion equation is derived for concentrated suspensions. The volume fraction (φ) dependence of the short- and long-time...
Persistent link: https://www.econbiz.de/10011057969
The Fokker–Planck equation for the translational modes of an inelastic system of Brownian particles in a non-equilibrium bath of light particles is derived from first principles of statistical mechanics. The bath and internal modes relax on a time scale that is much shorter than that of the...
Persistent link: https://www.econbiz.de/10010599471
The Fokker-Planck equation of a system of several Brownian particles immersed in a non-equilibrium bath of light particles is derived from first principles of statistical mechanics using time-dependent projection operators. The Fokker-Planck equation contains the usual equilibrium streaming and...
Persistent link: https://www.econbiz.de/10010871694
By introducing an order parameter that describes the geometry of clusters of particles, Liu and Oppenheim [Physica A 247 (1997) 183] developed a microscopic theory for hopping transport in glass-forming liquids. In this work we bring this theory within the frame of mode coupling theories in the...
Persistent link: https://www.econbiz.de/10010871696
The stochastic properties of the noise in Langevin type equations are studied. It is demonstrated that the noise is non-Gaussian and that the three point noise correlation function has an exponential decay on the slow time scale. Explicit calculations for systems containing one slow linear...
Persistent link: https://www.econbiz.de/10010871815
We consider a system consisting of n Brownian particles of arbitrary shape, with internal degrees of freedom, in a both of N spherical bath particles. We obtain a generalized Fokker-Planck equation for the distribution function, W(Qn,Pn,t), where Qn and Pn denote the generalized coordinates and...
Persistent link: https://www.econbiz.de/10010872084
Thermodynamic implications of various forms for the electromagnetic stress tensor are examined for polarizable media subject to an electromagnetic field. It is found that the Minkowski stress tensor for ponderable matter yields the simplest mathematical structure for constructing a theory of...
Persistent link: https://www.econbiz.de/10010584857
The low density form of the generalized frequency (s) and wavevector (k) dependent self-diffusion coefficient D(k, s) is calculated, from which the low density forms of related quantities, e.g. the velocity autocorrelation function, are derived. Agreement is obtained with the low density kinetic...
Persistent link: https://www.econbiz.de/10010584925