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Molecular Simulations of Non-Equilibrium Large Scale Phenomena in Fluids

  • M. Mareschal
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Part of the NATO ASI Series book series (NSSE, volume 205)

Abstract

In this article, we discuss the possibilities offered by microscopic simulations to examine the validity of the Navier Stokes equations of hydrodynamics for small space and time scales and when the constraints imposed on the model fluids are large. We discuss the dilute gas case in order to illustrate the deficiency of an analytical approach. We then focus on direct observation of dense fluids under constraints by molecular dynamics. The ability to simulate the Rayleigh-Bénard instability with 5000 hard disks, with a remarkable agreement with macroscopic behavior, provides a direct strong evidence that the hydrodynamical scale is very near the atomic scale. Possible extension of direct non-equilibrium simulations are discussed.

Keywords

Boltzmann Equation Rayleigh Number Hard Sphere Knudsen Number Transport Coefficient 
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Copyright information

© Springer Science+Business Media Dordrecht 1991

Authors and Affiliations

  • M. Mareschal
    • 1
  1. 1.S.R.M.P., CE SaclayGif-sur-Yvette cedexFrance

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