English

Generalized equations of hydrodynamics in fractional derivatives

Statistical Mechanics 2023-08-30 v2

Abstract

We present a general approach for obtaining the generalized transport equations with fractional derivatives using the Liouville equation with fractional derivatives for a system of classical particles and the Zubarev non-equilibrium statistical operator (NSO) method within the Gibbs statistics. We obtain the non-Markov equations of hydrodynamics for the non-equilibrium average values of densities of particle number, momentum and energy of liquid in a spatially heterogeneous medium with a fractal structure. For isothermal processes (β=1/kBT=const\beta=1/k_{B}T =const), the non-Markov Navier-Stokes equation in fractional derivatives is obtained. We consider models for the frequency dependence of memory function (viscosity), which lead to the Navier-Stokes equations in fractional derivatives in space and time.

Keywords

Cite

@article{arxiv.2308.14194,
  title  = {Generalized equations of hydrodynamics in fractional derivatives},
  author = {P. Kostrobij and B. Markovych and I. Ryzha and M. Tokarchuk},
  journal= {arXiv preprint arXiv:2308.14194},
  year   = {2023}
}

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23 pages