Abstract
A diffusion approximation is described to the nonlocal inertial energy transfer between wavenumber components in the spectral representation of an isotropic turbulent flow. The approximation yields Kolmogorov's inertial-range spectrum and is shown to be the local limit of a class of approximations suggested by Kraichnan and Spiegel. A spectrum in the viscous dissipation range is computed with the diffusion approximation and compared to spectra obtained from approximations of Heisenberg and Kovasznay as well as a modification of Obukhov's approximation and a recent prediction of Kraichnan. It agrees closely with the last two. Similarity spectra and associated longitudinal correlation functions are computed for decaying turbulence at infinite Reynolds number. A comparison is made with corresponding results based on the Heisenberg approximation.
References
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Dates
Type | When |
---|---|
Created | 20 years, 8 months ago (Dec. 24, 2004, 3:57 p.m.) |
Deposited | 2 years, 1 month ago (July 7, 2023, 9:42 p.m.) |
Indexed | 4 weeks, 1 day ago (Aug. 7, 2025, 4:23 p.m.) |
Issued | 58 years, 2 months ago (July 1, 1967) |
Published | 58 years, 2 months ago (July 1, 1967) |
Published Online | 20 years, 8 months ago (Dec. 9, 2004) |
Published Print | 58 years, 2 months ago (July 1, 1967) |
@article{Leith_1967, title={Diffusion Approximation to Inertial Energy Transfer in Isotropic Turbulence}, volume={10}, ISSN={0031-9171}, url={http://dx.doi.org/10.1063/1.1762300}, DOI={10.1063/1.1762300}, number={7}, journal={The Physics of Fluids}, publisher={AIP Publishing}, author={Leith, C. E.}, year={1967}, month=jul, pages={1409–1416} }