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- W4302611833 abstract "The EDQNM theory is used to study the behavior of the spectrum of the scalar flux in turbulent flow as the Reynolds number increases. In isotropic turbulence, at low and moderate Reynolds number, good agreement is observed with DNS and experimental results. The Reynolds number is varied up to a value of 107 and it is shown that at very high Reynolds numbers, the scalar flux spectrum in the inertial range behaves as predicted by the classical dimensional analysis of Lumley (1967) and scales as K−7/3. At Reynolds numbers corresponding to laboratory experiments the closure leads to a spectrum closer to K−2, showing that in the experiments the high Reynolds number asymptotic limit is not reached. The closure is then applied to homogeneous shear flow and the spectra of cross-stream and streamwise scalar flux are investigated. The streamwise scalar flux spectrum is found to scale as K−23/9. This result is in agreement with experiments but disagrees with classical dimensional analysis. An alternative asymptotic form is proposed." @default.
- W4302611833 created "2022-10-07" @default.
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- W4302611833 date "2005-01-01" @default.
- W4302611833 modified "2023-09-30" @default.
- W4302611833 title "CLOSURE STUDY OF THE REYNOLDS NUMBER DEPENDENCY OF THE SCALAR FLUX SPECTRUM" @default.
- W4302611833 doi "https://doi.org/10.1615/tsfp4.130" @default.
- W4302611833 hasPublicationYear "2005" @default.
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