A hierarchy of Poisson brackets in non-equilibrium thermodynamics

TL;DR

This paper explores the construction of Poisson brackets for reversible evolution in various thermodynamic systems, deriving them from the Liouville equation and proposing a new hierarchy for non-local phenomena.

Contribution

It systematically derives Poisson brackets for multiple thermodynamic theories and introduces a novel hierarchy capturing non-local effects like turbulence.

Findings

Derived Poisson brackets from Liouville equation for several systems

Identified limitations in the construction, such as in the BBGKY hierarchy

Proposed a new infinite hierarchy for non-local phenomena

Abstract

Reversible evolution of macroscopic and mesoscopic systems can be conveniently constructed from two ingredients: an energy functional and a Poisson bracket. The goal of this paper is to elucidate how the Poisson brackets can be constructed and what additional features we also gain by the construction. In particular, the Poisson brackets governing reversible evolution in one-particle kinetic theory, kinetic theory of binary mixtures, binary fluid mixtures, classical irreversible thermodynamics and classical hydrodynamics are derived from Liouville equation. Although the construction is quite natural, a few examples where it does not work are included (e.g. the BBGKY hierarchy). Finally, a new infinite grand-canonical hierarchy of Poisson brackets is proposed, which leads to Poisson brackets expressing non-local phenomena such as turbulent motion or evolution of polymeric fluids. Eventually, Lie-Poisson structures standing behind some of the brackets are identified.