2012, №1

сс. 47-63

The development of finite fluctuations in local density, velocity and temperature for real fluids

2012, №1

сс. 47-63

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Yu.A. Chaikina

Key words: statistical physics, non-equilibrium theory, non-ideal systems, critical phenomena, local fluctuations, supercritical fluids

Exact  analytical expressions for large-scale finite local fluctuations in  hydrodynamic velocity and temperature of dense non-ideal fluid are obtained.  Two simple models are proposed for probability distribution of density and  temperature finite fluctuations. It is shown that the fluctuating fluid can be  considered as two random fractions, one being more rarefied and the other being  more dense than the averaged fluid. The distinctive features of these random  fractions make them play different roles in physical and chemical behavior of  the fluid. It is stated that large-scale finite local fluctuations are common  for wide range of fluid states, not only for the neighborhood of gas— liquid  critical point.

doi:10.1134/S1990793112070020