Abstract
A brief report on two recent studies of the organized structures in turbulent shear flows is presented. Both studies were conducted using databases generated by three-dimensional, time-dependent numerical simulation of turbulent flows. In the first study, it is shown that turbulent shear flows contain an appreciable number of hairpin vortices inclined at 45° to the mean flow direction. The second study provides a preliminary evaluation of the characteristic eddy decomposition of turbulence (Lumley’s Orthogonal Decomposition) as a means for extracting organized structures from turbulent flow fields. It is shown that the extracted eddies are energetic and have a significant contribution to turbulence production.
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References
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Moin, P. (1985). A Note on the Structure of Turbulent Shear Flows. In: Dwoyer, D.L., Hussaini, M.Y., Voigt, R.G. (eds) Theoretical Approaches to Turbulence. Applied Mathematical Sciences, vol 58. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-1092-4_18
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DOI: https://doi.org/10.1007/978-1-4612-1092-4_18
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