Heat conduction and Fourier's law by consecutive local mixing and thermalization

Details Heat conduction and Fourier's law by consecutive local mixing and thermalization Heat conduction and Fourier's law by consecutive local mixing and thermalization

2008-06-13

arxiv.org/abs/0806.2193v1

Phys. Rev. Lett. 101 020601 (2008)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 color figures, to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.101.020601

We present a first-principles study of heat conduction in a class of models which exhibit a new multi-step local thermalization mechanism which gives rise to Fourier's law. Local thermalization in our models occurs as the result of binary collisions among locally confined gas particles. We explore the conditions under which relaxation to local equilibrium, which involves no energy exchange, takes place on time scales shorter than that of the binary collisions which induce local thermalization. The role of this mechanism in multi-phase material systems such as aerogels is discussed.

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