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Measurements of spectral energy transfer in grid turbulence

Published online by Cambridge University Press:  29 March 2006

C. W. Van Atta  and
W. Y. Chen
C. W. Van Atta
Affiliation:
Department of the Aerospace and Mechanical Engineering Sciences, University of California, San Diego
W. Y. Chen
Affiliation:
Department of the Aerospace and Mechanical Engineering Sciences, University of California, San Diego
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Abstract

Direct measurements of the energy transfer spectrum in locally isotropic grid turbulence have been used to determine the extent of validity for grid turbulence of the dynamical equation for the three-dimensional energy spectrum in isotropic turbulence. The extent of applicability of the isotropic energy balance is consistent with the usual local isotropy criterion based on energy spectra alone.

The present results are in general agreement with some previous measurements by Uberoi, who determined the transfer spectrum assuming the strict validity of the isotropic dynamical equation. The measured energy transfer spectra are quantitatively similar to those calculated by Kraichnan using the direct-interaction approximation.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 38 , Issue 4 , 6 October 1969 , pp. 743 - 763
Copyright
© 1969 Cambridge University Press

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References

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Michalke, A. 1965 J. Fluid Mech. 23, 521.
Squire, H. B. 1933 Proc. Roy. Soc. A, 142, 621.