Entropy creation rate is introduced for a system interacting with thermostats ({\it i.e.} for a system subject to internal conservative forces interacting with ``external'' thermostats via conservative forces) and a fluctuation theorem for it is proved. As an application a time scale is introduced, to be interpreted as the time over which irreversibility becomes manifest in a process leading from an initial to a final stationary state of a mechanical system in a general nonequilibrium context. The time scale is evaluated in a few examples, including the classical Joule-Thompson process (gas expansion in a vacuum).
Irreversibility time scale / Gallavotti, Giovanni. - In: CHAOS. - ISSN 1054-1500. - STAMPA. - 16:(2006), pp. 023130-1-023130-7. [10.1063/1.2205387]
Irreversibility time scale
GALLAVOTTI, Giovanni
2006
Abstract
Entropy creation rate is introduced for a system interacting with thermostats ({\it i.e.} for a system subject to internal conservative forces interacting with ``external'' thermostats via conservative forces) and a fluctuation theorem for it is proved. As an application a time scale is introduced, to be interpreted as the time over which irreversibility becomes manifest in a process leading from an initial to a final stationary state of a mechanical system in a general nonequilibrium context. The time scale is evaluated in a few examples, including the classical Joule-Thompson process (gas expansion in a vacuum).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.