Thermodynamic instability of a confined gas

Details Thermodynamic instability of a confined gas Thermodynamic instability of a confined gas

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006phrve..74e1103p&link_type=abstract

Physical Review E, vol. 74, Issue 5, id. 051103

Physics

Condensed Matter

Statistical Mechanics

11

Classical Statistical Mechanics, Thermodynamic Processes, Conduction, Convection, Equations Of State, Numerical Simulations Of Chaotic Systems, Thermodynamics

Scientific paper

The best possible cooling agent is a system with negative specific heat. If in thermal contact with a second system, any acquisition of energy due to a random fluctuation lowers its temperature, and the energy transfer in this direction is further enhanced. It continues until all the energy is extracted from the second system and their temperatures are at par. We exhibit these microcanonical features with a simple mechanical model of interacting classical gas particles in a specially confined domain and subjected to gravitation. As predicted, most of the gas particles are cooled and collect in the lowest part of the container, where the energy is carried away by a few remaining particles.

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