This paper explores the rather controversial proposal by Howard Brenner that the velocities that follow from the mass flux and from the translational momentum in a fluid, are not equal. We show that standard non-equilibrium thermodynamics can be formulated such that it is in full agreement with...

We provide a physical insight into the mechanism of the bulk viscosity ζ and construct a new expression of ζ directly from microscopic information such as the interatomic potential and the pair distribution function. This is an outstanding advantage when compared to the previously proposed...

A revision of Newton's law of viscosity appearing in the role of the deviatoric stress tensor in the Navier–Stokes equation is proposed for the case of compressible fluids, both gaseous and liquid. Explicitly, it is hypothesized that the velocity v appearing in the velocity gradient term ∇v...

We present a numerical comparison between two Lagrangian techniques for the simulation of fluids, smoothed dissipative particle dynamics (SDPD) and Voronoi fluid particle model. These methods reproduce the movement of the fluid with extensive particles. The main differences between these...

Small-angle light and X-ray scattering are used to study the morphology of reinforcing fillers in organic rubbers. The data, which extend over six orders of magnitude in length scale, reveal a complex morphology of the powders consisting of primary particles, aggregates and agglomerates. The...

We propose an extended kinetic model for polyatomic ideal gases that replaces the Boltzmann collision operator with a single relaxation-time term. The model contains several position and time dependent coefficients that are determined by keeping some of the main properties of the Boltzmann...

The dynamic structure factor as well as the generalized Landau–Placzek relation are calculated from a set of equations describing a monatomic gas in the moderately dense region. These studies start from the 13-moment Grad's approximation to solve the Enskog equation giving us a description of...

Many soft materials, such as gels or glasses, exhibit both a fast and a very slow relaxation behavior, often related to thermally activated processes restoring ergodicity. Pusey and Van Megen (Physica A 157 (1989) 705), have elaborated a theory that allows the usage of standard light scattering...