On the use of Kolmogorov-Landau approach in deriving various correlation functions in 2-D incompressible turbulence

Details On the use of Kolmogorov-Landau approach in deriving various correlation functions in 2-D incompressible turbulence On the use of Kolmogorov-Landau approach in deriving various correlation functions in 2-D incompressible turbulence

2006-11-20

arxiv.org/abs/cond-mat/0611520v2

Phys. Fluids 19, 085110 (2007)

Physics

Condensed Matter

Other Condensed Matter

A typos-corrected version of the earlier submission

Scientific paper

10.1063/1.2760282

We look at various correlation functions, which include those that involve both the velocity and the vorticity fields, in 2-D isotropic homogeneous decaying turbulence.We adopt the more intuitive approach due to Kolmogorov (and subsequently, Landau in his text on fluid dynamics) and show that how the 2-D turbulence results, obtainable using other methods, may be established in a simpler way.Also, some experimentally verifiable correlation functions in the dissipation range have been derived for the same system.The paper also showcases the inability of the Kolmogorov-Landau approach to get the ``one-eighth law'' in the enstrophy cascade region.As discussed in the paper, this may raise the spectre of logarithmic corrections once again in 2-D turbulence.

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