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A theory of hydrodynamic turbulence based on non-equilibrium statistical mechanics

Fluid Dynamics 2017-12-06 v1

Abstract

In earlier papers we have studied the turbulent flow exponents ζp\zeta_p, where Δvpζp\langle|\Delta{\bf v}|^p\rangle\sim\ell^{\zeta_p} is the contribution to the fluid velocity at small scale \ell. Using ideas of non-equilibrium statistical mechanics we have found ζp=p31lnκlnΓ(p3+1) \zeta_p={p\over3}-{1\over\ln\kappa}\ln\Gamma({p\over3}+1) where 1/lnκ1/ln\kappa is experimentally 0.32±0.01\approx 0.32\pm 0.01. The purpose of the present note is to propose a somewhat more physical derivation of the formula for ζp\zeta_p. We also present an estimate 100\approx 100 for the Reynolds number at the onset of turbulence.

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Cite

@article{arxiv.1707.02567,
  title  = {A theory of hydrodynamic turbulence based on non-equilibrium statistical mechanics},
  author = {David Ruelle},
  journal= {arXiv preprint arXiv:1707.02567},
  year   = {2017}
}

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6 pages