Differential consequences of balance laws in extended irreversible thermodynamics of rigid heat conductors

Coupled heat devices in linear irreversible thermodynamics.

Full analytical models of heat engines and refrigerators in linear irreversible thermodynamics can be defined by means of a chain of coupled heat devices. In this way it is possible to derive results and techniques of finite-time thermodynamics, like endoreversible efficiencies and the usual models of irreversible heat devices, in terms of an endoreversible energy converter plus a heat leak bet...

Variational Formulations and Extended Thermodynamics for Resting Irreversible Fluids with Heat Flow

Nonequilibrium statistical mechanics helps to estimate corrections to the entropy and energy of the fluid with heat flux in terms of the nonequilibrium distribution function, f. This leads to the coefficients of wave model of heat: relaxation time, propagation speed and thermal inertia. With these data a quadratic Lagrangian and a variational principle of Hamilton’s type follows for the fluid i...

Balance Laws for Higher Order Fluxes in Non-equilibrium Thermodynamics

The connection between the balance structure of the evolution equations of higher order fluxes and different forms of the entropy current is investigated on the example of rigid heat conductors. It is argued that Non-Equilibrium Thermodynamics with dynamic degrees of freedom gives a proper general frame of these investigations. Thermodynamic closure relations are derived.

Basics of Irreversible Thermodynamics

Irreversible Thermodynamics

There are alternative sets of postulates which yield entirely equivalent results for several important theories. In such cases the choice of a particular set of postulates may be based upon mathematical simplicity, close relationship to experiments or to the nature of the theory, or merely personal taste. While the postulate of conservation of energy is usually presented in similar form for the...