The influence of a boundary layer in the Couette flow of a rarefied gas is studied by means of the Grad's solution for the Boltzmann equation. The boundary conditions satisfied by the relevant Grad's moments are calculated through the simplest wall model which is characterized by some...

This work is concerned with the description of the time evolution for the entropy functional in a dense fluid out of equilibrium. We consider the fluid as a collection of N particles interacting via the superposition of pairwise additive short range intermolecular potentials. Such an interaction...

The maximum entropy formalism is developed to implement a complete description of a dense gas in non-equilibrium situations. Two variational schemes are discussed in this context. The kinetic equations describing the system are consistently closed with the N-particle distribution function...

The generalized hydrodynamic behavior of an Enskog moderately dense gas has been studied mainly through the correlation functions approach. However, the kinetic model based on the Grad's method to solve the Enskog equation seems to be a good alternative to such studies. In this work, we explore...

We use Grad's method to solve the Wang-Chang-Uhlenbeck-de Boer equation for dilute polyatomic gases, and we study the non-equilibrium mean energy associated with the internal degrees of freedom in order to calculate the thermal conductivity and the Eucken factor.

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...

A kinetic theory approach is developed from the semiclassical Boltzmann transport equation for the thermotransport of electrons in polar semiconductors in the degenerate limit. The method of moments drives to a set of hydrodynamical equations which are closed up to thirteen relevant variables,...

This paper concerns the behavior of the entropy production in a dense gas. A bound for this quantity is found in terms of the energy conversion rate between particles and Fisher's information integrals describing the system.

The Onsager Symmetry Relations (OSR), which are of fundamental importance in Linear Irreversible Thermodynamics (LIT), are not obeyed by the linearized Burnett equations for a dilute gas. In this paper we present a solution to this problem, which consists of an enlargement of the space of...

In this work we develop a semiclassical kinetic model to construct hydrodynamic equations to study the nonequilibrium behavior of an electron gas in a semiconductor. To describe the system we assume that the Boltzmann transport equation is valid and we solve it in terms of the first 13 moments,...