https://doi.org/10.1140/epjb/e20020015
Separation of dissipation from diffusion
Department of Physics, University of California, Santa Barbara, CA 93106, USA
Corresponding author: a tong@physics.ucsb.edu
Received:
30
August
2001
Published online: 15 January 2002
We study velocity correlations induced by diffusion and dissipation in a simple dissipative dynamical system. We observe that diffusion, as a result of time reversible microscopic processes, leads to correlations with different spatial parity from those caused by dissipation, consisting of time irreversible microscopic processes. The velocity correlations observed conflict with the “molecular chaos” assumption of the Boltzmann equation. To account for the apparent correlation structures in our simple model system, we propose that they indicate geometric distortion of the phase space.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 05.60.Cd – Classical transport / 02.40.-k – Geometry, differential geometry, and topology
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
