Speed-gradient principle for nonstationary processes in thermodynamics

Details Speed-gradient principle for nonstationary processes in thermodynamics Speed-gradient principle for nonstationary processes in thermodynamics

2007-01-28

arxiv.org/abs/physics/0701312v1

Physics

General Physics

5 pages

Scientific paper

The speed-gradient variational principle (SG-principle) is formulated and applied to thermodynamical systems. It is shown that Prigogine's principle of minimum entropy production and Onsager's symmetry relations can be interpreted in terms of the SG-principle and, therefore, are equivalent to each other. In both cases entropy of the system plays a role of the goal functional. The speed-gradient formulation of thermodynamic principles provide their extended versions, describing transient dynamics of nonstationary systems far from equilibrium. As an example a model of transient (relaxation) dynamics for maximum entropy principle is derived.

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