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Article Dans Une Revue Journal of Physical Chemistry B Année : 2008

Non Poissonian statistics in a low density fluid

Résumé

Our interest goes to the collisional statistics in an arbitrary interacting fluid. We show that even in the low density limit and contrary to naive expectation, the number of collisions experienced by a tagged particle in a given time does not obey Poisson law, and that conversely, the free flight time distribution is not a simple exponential. As an illustration, the hard sphere fluid case is worked out in detail. For this model, we quantify analytically those deviations and successfully compare our predictions against molecular dynamics simulations.
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hal-00303732 , version 1 (05-06-2023)

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Paolo Visco, Frédéric van Wijland, Emmanuel Trizac. Non Poissonian statistics in a low density fluid. Journal of Physical Chemistry B, 2008, 112 (17), pp.5412. ⟨10.1021/jp800333h⟩. ⟨hal-00303732⟩
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