Energy transfer process in gas models of Lennard-Jones interactions

Details Energy transfer process in gas models of Lennard-Jones interactions Energy transfer process in gas models of Lennard-Jones interactions

2011-02-14

arxiv.org/abs/1102.2665v1

Physics

Classical Physics

5 pages,3 figure

Scientific paper

We perform simulations to investigate how the energy carried by a molecule transfers to others in an equilibrium gas model. For this purpose we consider a microcanonical ensemble of equilibrium gas systems, each of them contains a tagged molecule located at the same position initially. The ensuing transfer process of the energy initially carried by the tagged molecule is then exposed in terms of the ensemble-averaged energy density distribution. In both a 2D and a 3D gas model with Lennard-Jones interactions at room temperature, it is found that the energy carried by a molecule propagates in the gas ballistically, in clear contrast with the Gaussian diffusion widely assumed in previous studies. A possible scheme of experimental study of this issue is also proposed

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