Energy transfer process in gas models of Lennard-Jones interactions

Jinghua Yang; Yong Zhang; Jiao Wang; Hong Zhao

doi:10.1103/physreve.83.052104

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arXiv · 1102.2665

Energy transfer process in gas models of Lennard-Jones interactions

Jinghua Yang·Yong Zhang·Jiao Wang·Hong Zhao

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Abstract

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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Jinghua Yang, Yong Zhang, Jiao Wang, Hong Zhao. 2011-02-14. Energy transfer process in gas models of Lennard-Jones interactions. https://doi.org/10.1103/physreve.83.052104

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